Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Schedule Of Share-Based Payment Arrangements (Details)

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Stock-Based Compensation Schedule Of Share-Based Payment Arrangements (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation cost $ 857 $ 1,082 $ 1,190
Cost of revenues      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation cost 26 34 39
Operating expenses      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation cost 831 1,048 1,151
Restricted stock and restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation cost 521 566 765
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation cost 331 326 366
Performance shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation cost $ 5 $ 190 $ 59