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Note 1 - Organization and Significant Accounting Policies (Details Textual)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
May 31, 2021
USD ($)
Aug. 31, 2019
USD ($)
Jul. 31, 2019
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
Jan. 01, 2019
USD ($)
Payments to Acquire Intangible Assets           $ (0) $ (0) $ 7,364    
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Total           0     $ 0  
Impairment of Long-Lived Assets to be Disposed of           0 0 0    
Operating Lease, Right-of-Use Asset           8,827 9,052      
Operating Lease, Liability, Total           $ 8,404        
Number of Operating Segments           1        
Number of Reportable Segments           1        
Goodwill, Impairment Loss           $ 0        
Impairment of Intangible Assets, Finite-lived           0 0 $ 0    
Investments, Fair Value Disclosure, Total           $ 2,919        
Technical Support Period (Month)           12 months        
Sales Commission, Expected Amortization Period Within Which the Sales Commission Fee is Expensed When Incurred (Year)               1 year    
Reduction from Research and Development Expenses Due to Receipt of Grants           $ 3,595 2,844 $ 5,643    
Research and Development Tax Credit           2,299 3,287 2,312    
Investment Tax Credit           $ 248 198 $ 201    
Defined Contribution Plan, Contribution Rate           10.00%        
Defined Contribution Plan, Employer Matching Contribution, Percent of Match               50.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay           6.00%        
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent           15.00%        
Defined Contribution Plan, Employer Discretionary Contribution Amount           $ 1,155 1,232 $ 1,189    
Severance Costs           1,943 1,983 1,826    
Advertising Expense           $ 623 $ 559 $ 996    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares           65,073 1,132,017 184,947    
Foreign Exchange Forward and Option Contracts [Member] | Cash Flow Hedging [Member]                    
Derivative, Notional Amount           $ 4,500 $ 0      
Stock Options, Stock Appreciation Rights and Employee Stock Purchase Plan [Member]                    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total           18,817        
Restricted Stock Units (RSUs) [Member]                    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total           $ 0        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)           1 year 7 months 6 days        
Maximum [Member]                    
Finite-Lived Intangible Asset, Useful Life (Year)           7 years 6 months        
Percentage of Royalty Expense           3.50%        
Maximum [Member] | Foreign Exchange Forward and Option Contracts [Member] | Cash Flow Hedging [Member]                    
Payroll of Non-US Employees Hedged, Term of Hedging Contracts (Month)           12 months        
Minimum [Member]                    
Percentage of Royalty Expense           3.00%        
Minimum [Member] | Foreign Exchange Forward and Option Contracts [Member] | Cash Flow Hedging [Member]                    
Payroll of Non-US Employees Hedged, Term of Hedging Contracts (Month)           1 month        
Operating Lease, Right-of-Use Asset [Member]                    
Prepaid Rent                   $ 287
Accounting Standards Update 2016-02 [Member]                    
Operating Lease, Right-of-Use Asset                   9,785
Operating Lease, Liability, Total                   $ 9,498
Short-term Investments [Member]                    
Percentage of Interest Rate, Savings Deposits           1.12% 2.53% 2.64%    
Long-term Investments [Member]                    
Percentage of Interest Rate, Savings Deposits           1.15% 1.32% 2.94%    
Licensing Agreements [Member] | Immervision [Member]                    
Payments to Acquire Intangible Assets   $ 10,000                
Acquisition of Hillcrest Labs [Member]                    
Business Combination, Consideration Transferred, Total     $ 11,204              
Payments to Acquire Businesses, Gross     10,000   $ 204          
Business Combination, Amount Held in Escrow to Satisfy Possible Indemnification Claims     $ 1,000              
Business Combination, Acquisition Related Costs               $ 462    
Intrinsix Corp. [Member]                    
Business Combination, Consideration Transferred, Total $ 33,096                  
Payments to Acquire Businesses, Gross 26,704                  
Business Combination, Consideration Transferred, Escrow to Satisfy Indemnification Claims 4,260                  
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred       $ (473)            
Intrinsix Corp. [Member] | General and Administrative Expense [Member]                    
Business Combination, Acquisition Related Costs           $ 970        
Intrinsix Corp. [Member] | Chief Executive Officer and Chief Technology Officer of Intrinsix [Member]                    
Business Combination, Consideration Transferred, Liabilities Incurred $ 2,605                  
Percentage of Merger Consideration 25.00%