Entity Central Index Key Finite lived intangible assets amortization expense year five and after year five. Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock Shares Outstanding Entity Common Stock Shares Outstanding Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Title of 12(b) Security Security12b Title Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity File Number Entity File Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Accrued expenses and other current liabilities. Statement Of Financial Position [Abstract] Assets: Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Accounts receivable, net Accounts Receivable Net Current Related party accounts receivable Accounts Receivable Related Parties Current Inventories Inventory Net Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Intangible assets, net Finite Lived Intangible Assets Net Right-of-use assets, net Operating Lease Right Of Use Asset Other assets Other Assets Noncurrent Total assets Assets Liabilities and Stockholders' Equity: Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses and other current liabilities Accrued Expenses And Other Current Liabilities Loan obligations Short Term Borrowings Total current liabilities Liabilities Current Lease liabilities Operating Lease Liability Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 10) Commitments And Contingencies Stockholders’ equity: Stockholders Equity [Abstract] Common stock, $0.0001 par value - 200,000 shares authorized; 15,061 and 14,968 shares issued and outstanding at March 31, 2020 and December 31, 2019 Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares, issued Common Stock Shares Issued Common stock, shares, outstanding Common Stock Shares Outstanding Net income (loss) attributable to common stockholder and comprehensive income (loss). Income Statement [Abstract] Revenue Revenue From Contract With Customer Excluding Assessed Tax Cost of revenue Cost Of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research And Development Expense Selling, general and administrative Selling General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Interest expense Interest Expense Other income (expense), net Other Nonoperating Income Expense Loss before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax benefit (expense) Income Tax Expense Benefit Net loss Net Income Loss Net loss attributable to common stockholders and comprehensive loss Net Income Loss Attributable To Common Stockholder And Comprehensive Income Loss Net loss per share attributable to common stockholders, basic and diluted Earnings Per Share Basic And Diluted Weighted-average shares used to compute basic and diluted net loss per share Weighted Average Number Of Share Outstanding Basic And Diluted Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Beginning Balance Beginning Balance, Shares Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Net loss Tax withholdings related to net share settlement of restricted stock units Restricted Stock Value Shares Issued Net Of Tax Withholdings Ending Balance Ending Balance, Shares Non cash operating lease cost and other. Increase decrease in lease liabilities. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Net loss Profit Loss Adjustments to reconcile net loss to net cash provided by Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization expense Depreciation Depletion And Amortization Non-cash operating lease cost and other Non Cash Operating Lease Cost And Other Stock-based compensation expense Share Based Compensation Changes in assets and liabilities: Increase Decrease In Operating Capital [Abstract] Accounts receivable, net Increase Decrease In Accounts Receivable Related party accounts receivable Increase Decrease In Accounts Receivable Related Parties Inventories Increase Decrease In Inventories Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses and other liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Lease liabilities Increase Decrease In Lease Liabilities Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities Net Cash Provided By Used In Investing Activities [Abstract] Purchase of property and equipment Payments To Acquire Property Plant And Equipment Cash paid for intangibles Payments To Acquire Intangible Assets Net cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities Net Cash Provided By Used In Financing Activities [Abstract] Tax withholding paid on behalf of employees for net share settlement Payments Related To Tax Withholding For Share Based Compensation Proceeds from loans from financial institutions Proceeds From Lines Of Credit Principal payments on loan to financial institutions Repayments Of Lines Of Credit Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Net increase in cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract] Beginning of period End of period Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Interest paid during the period Interest Paid Net Income taxes paid Income Taxes Paid Net Supplemental disclosure of noncash flow information Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Unpaid property and equipment Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 Unpaid deferred offering costs Debt Issuance Costs Incurred During Noncash Or Partial Noncash Transaction Right-of-use assets acquired under operating leases Right Of Use Asset Obtained In Exchange For Operating Lease Liability Accounting Policies [Abstract] The Company and Basis of Presentation Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Text Block] Earnings Per Share [Abstract] Net Loss Per Share Earnings Per Share [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Balance Sheet Related Disclosures [Abstract] Balance Sheets Components Supplemental Balance Sheet Disclosures [Text Block] The entire disclosure for operating leases of lessee and lessor. Lessee information also Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. Leases [Abstract] Leases Leases Of Lessor And Lessee Disclosure [Text Block] Equity [Abstract] Stockholders' Equity Stockholders Equity Note Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Segment Reporting [Abstract] Segment and Geographic Information Segment Reporting Disclosure [Text Block] Debt Disclosure [Abstract] Debt Obligations Debt Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Outbreak of coronavirus disease 2019. Organization Consolidation And Presentation Of Financial Statements [Abstract] Outbreak of Coronavirus Disease 2019 (“the COVID-19 pandemic”) Outbreak Of Coronavirus Disease Twenty Nineteen Policy [Text Block] Reporting Calendar Fiscal Period Principles of Consolidation Consolidation Policy [Text Block] Significant accounting policies. Significant Accounting Policies Significant Accounting Policies Policy [Text Block] Accounting Standards Recently Adopted/Not Yet Adopted New Accounting Pronouncements Policy Policy [Text Block] Summary of Computation of Basic and Diluted Net Income (Loss) per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of Inventory Schedule Of Inventory Current Table [Text Block] Schedule of Prepaid Expenses and Other Current Assets Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Text Block] Schedule of Property and Equipment Net Property Plant And Equipment [Text Block] Schedule of Intangible Assets, Net Schedule Of Finite Lived Intangible Assets Table [Text Block] Schedule of Future Amortization Expense for Intangible Assets Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block] Schedule of Accrued Expenses and Other Current Liabilities Schedule Of Accounts Payable And Accrued Liabilities Table [Text Block] Operating lease assets and liabilities. Summary of Lease Related Assets and Liabilities Operating Lease Assets And Liabilities Table [Text Block] Summary of Lease Costs Lease Cost Table [Text Block] Summary of Undiscounted Cash Flows Lessee Operating Lease Liability Maturity Table [Text Block] Schedule of Restricted Stock Unit Award ("RSU") Activity Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block] Schedule of Stock-based Compensation Expense Amounts Included in Condensed Consolidated Statement of Operations Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Schedule of provision for income taxes and effective tax rates. Schedule of Provision for Income Taxes and Effective Tax Rates Schedule Of Provision For Income Taxes And Effective Tax Rates Table [Text Block] Schedule of Revenue by Country Schedule Of Revenues From External Customers And Long Lived Assets By Geographical Areas Table [Text Block] Schedule of Long Term Debt Schedule Of Debt Table [Text Block] Schedule of Debt Obligations Schedule Of Debt Instruments [Text Block] Summary of Significant Balances, Transactions and Payments with Related Parties and Affiliates Schedule Of Related Party Transactions Table [Text Block] Significant accounting policies. Significant accounting policies. Significant Accounting Policies [Table] Significant Accounting Policies [Table] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Mega Chips. MegaChips Mega Chips [Member] Ownership Ownership [Axis] Ownership Ownership [Domain] SiTime Corporation. SiTime Corporation Si Time Corporation [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Percentage of outstanding common stock held Minority Interest Ownership Percentage By Parent Net loss attributable to common stockholders Net loss attributable to common stockholders per share, basic and diluted Assets Fair Value Disclosure [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Level 1 Fair Value Inputs Level1 [Member] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Cash balances in bank Cash And Cash Equivalents Fair Value Disclosure Highly liquid money market funds Money Market Funds At Carrying Value Inventory Disclosure [Abstract] Raw materials Inventory Raw Materials Work in progress Inventory Work In Process Finished goods Inventory Finished Goods Total inventories Prepaid Expense And Other Assets Current [Abstract] Advance to suppliers Supplies Prepaid expenses Prepaid Expense Current Other current assets Other Assets Current Total prepaid and other current assets Property Plant And Equipment [Abstract] Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Lab equipment member. Lab Equipment Lab Equipment [Member] Computer Equipment Computer Equipment [Member] Furniture and Fixtures Furniture And Fixtures [Member] Construction in Progress Construction In Progress [Member] Leasehold Improvements Leasehold Improvements [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Property and equipment, gross Property Plant And Equipment Gross Accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Total property and equipment, net Depreciation expense Depreciation Goodwill And Intangible Assets Disclosure [Abstract] Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Internal use software member. Internal use software Internal Use Software [Member] Purchased intangibles member. Purchased intangibles Purchased Intangibles [Member] Finite Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Intangible assets, gross Finite Lived Intangible Assets Gross Accumulated amortization Finite Lived Intangible Assets Accumulated Amortization Intangible assets, net Amortization expense for intangible assets Amortization Of Intangible Assets Intangibles Assets not amortized Intangible Assets Gross Excluding Goodwill Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract] 2020 (remainder) Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year 2021 Finite Lived Intangible Assets Amortization Expense Year Two 2022 Finite Lived Intangible Assets Amortization Expense Year Three 2023 Finite Lived Intangible Assets Amortization Expense Year Four 2024 and beyond Finite Lived Intangible Assets Amortization Expense Year Five And After Year Five Price changes and other revenue reserves current Payables And Accruals [Abstract] Accrued payroll and related benefits Employee Related Liabilities Current Price adjustment and other revenue reserves Price Changes And Other Revenue Reserves Current Short term lease liability Operating Lease Liability Current Other accrued expenses Other Accrued Liabilities Current Total accrued expenses and other current liabilities Leases not yet commenced Lessee Operating Lease Lease Not Yet Commenced Description Lease liabilities included in accrued expenses and other current liabilities Total operating lease liabilities Operating Lease Liability Weighted-average remaining lease term (years) Operating Lease Weighted Average Remaining Lease Term1 Weighted-average discount rate Operating Lease Weighted Average Discount Rate Percent Operating lease cost Operating Lease Cost Short-term lease cost Short Term Lease Cost Variable lease cost Variable Lease Cost Total lease cost Lease Cost Cash paid for operating lease liabilities Operating Lease Payments Sublease income Sublease Income 2020 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year Lessee Operating Lease Liability Payments Due Next Twelve Months 2021 Lessee Operating Lease Liability Payments Due Year Two 2022 Lessee Operating Lease Liability Payments Due Year Three 2023 Lessee Operating Lease Liability Payments Due Year Four 2024 Lessee Operating Lease Liability Payments Due Year Five 2025 and beyond Lessee Operating Lease Liability Payments Due After Year Five Total minimum lease payments Lessee Operating Lease Liability Payments Due Less: amount of lease payments representing interest Lessee Operating Lease Liability Undiscounted Excess Amount Less: current obligations under leases Long-term lease liabilities 2020 Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock Units RSU Restricted Stock Units R S U [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Shares Outstanding, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Shares Outstanding, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Shares Outstanding, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Shares Outstanding, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Shares Outstanding, Ending Balance Grant Date Fair Value per share, Beginning Balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Grant Date Fair Value per share, Granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Grant Date Fair Value per share, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Grant Date Fair Value per share, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value Grant Date Fair Value per share, Ending Balance Issued of common stock Stock Issued During Period Shares Restricted Stock Award Gross Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Cost of Revenue Cost Of Sales [Member] Research and Development Research And Development Expense [Member] Selling, General and Administrative Selling General And Administrative Expenses [Member] Stock-based compensation expense Allocated Share Based Compensation Expense Unrecognized compensation costs Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Unrecognized compensation cost is expected weighted average period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Loss before income taxes Provision (benefit) for income tax Effective tax rate Effective Income Tax Rate Continuing Operations Change in valuation allowance Valuation Allowance Deferred Tax Asset Change In Amount Unrecognized tax benefits Unrecognized Tax Benefits Number of reportable segments Number Of Reportable Segments Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Taiwan TAIWAN, PROVINCE OF CHINA Hong Kong HONG KONG United States UNITED STATES Other countries. Other Other Countries [Member] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Revenue from Contract with Customer Benchmark Revenue From Contract With Customer [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Percentage of long lived assets. Percentage of long lived assets Percentage Of Long Lived Assets Line Of Credit Facility [Table] Line Of Credit Facility [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving Line of Credit Revolving Credit Facility [Member] Lender Name Line Of Credit Facility [Axis] Line of Credit Facility, Lender Line Of Credit Facility Lender [Domain] SMBC. SMBC S M B C [Member] Line Of Credit Facility [Line Items] Line Of Credit Facility [Line Items] Weighted average interest rate on short term borrowings outstanding Short Term Debt Weighted Average Interest Rate Over Time Debt Instrument [Table] Debt Instrument [Table] MUFG. MUFG M U F G [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Short term portion of total debt Lines Of Credit Current Less: Current portion of long-term debt Long Term Debt Current Long-term debt Long Term Debt Debt Instruments [Abstract] Debt Instrument, Redemption, Period Debt Instrument Redemption Period [Axis] Debt Instrument, Redemption, Period Debt Instrument Redemption Period [Domain] 2.46% loan maturing on 9/21/2020. 2.46% Loan Maturing on 9/21/2020 Two Point Four Six Percentage Loan Maturing On Twenty First September Two Thousand And Twenty [Member] 2.37% loan maturing on 3/24/2021. 2.37% Loan Maturing on 3/24/2021 Two Point Three Seven Percentage Loan Maturing On Twenty Fourth March Two Thousand And Twenty One [Member] 2.97% loan maturing on 6/10/2020. 2.97% Loan Maturing on 6/10/2020 Two Point Nine Seven Percentage Loan Maturing On Tenth June Two Thousand And Twenty [Member] 3.10% Loan Maturing on 2/19/2020. 3.10% Loan Maturing on 2/19/2020 Three Point One Zero Percentage Loan Maturing On Nineteenth February Two Thousand And Twenty [Member] Loan Start Date Debt Instrument Issuance Date1 Loan Amount Annual Interest Rate Debt Instrument Interest Rate Stated Percentage Maturity Date Debt Instrument Maturity Date Line of credit facility, remaining borrowing capacity Line Of Credit Facility Remaining Borrowing Capacity Prepaid expenses and other assets related parties current. Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] Affliates Affiliated Entity [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Prepaid expenses and other current assets Prepaid Expenses And Other Assets Related Parties Current Accounts payable Accounts Payable Related Parties Current License expense related party. Commission expense related party. Sales through distribution agreement Revenue From Related Parties License expense License Expense Related Party Commission expense Commission Expense Related Party Consulting fees Related Party Transaction Expenses From Transactions With Related Party Cash paid for commission related party. Cash paid for license related party. Cash paid for consulting fees related party. Cash paid for commissions Cash Paid For Commission Related Party Cash paid for licenses Cash Paid For License Related Party Cash paid for consulting fees Cash Paid For Consulting Fees Related Party