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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock and Additional Paid-in Capital
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning balance at Dec. 31, 2019 $ 47,904 $ 96,623 $ (4,659) $ 8 $ (44,068)
Stock-based compensation   1,322      
Replacement awards issued in relation to acquisition   0      
Issuance of shares for stock purchase plan   91      
Repurchases of common stock     (608)    
Unrealized gain on available-for-sale securities, net of deferred taxes 8     8  
Net loss (1,938)       (1,938)
Ending balance at Jun. 30, 2020 46,779 98,036 (5,267) 16 (46,006)
Beginning balance at Mar. 31, 2020 47,235 97,361 (4,849) (7) (45,270)
Stock-based compensation   654      
Replacement awards issued in relation to acquisition   0      
Issuance of shares for stock purchase plan   21      
Repurchases of common stock     (418)    
Unrealized gain on available-for-sale securities, net of deferred taxes 23     23  
Net loss (736)       (736)
Ending balance at Jun. 30, 2020 46,779 98,036 (5,267) 16 (46,006)
Beginning balance at Dec. 31, 2020 47,742 100,356 (5,267) 0 (47,347)
Stock-based compensation   1,936      
Replacement awards issued in relation to acquisition   40      
Issuance of shares for stock purchase plan   2,240      
Repurchases of common stock     0    
Unrealized gain on available-for-sale securities, net of deferred taxes 0     0  
Net loss (2,372)       (2,372)
Ending balance at Jun. 30, 2021 49,586 104,572 (5,267) 0 (49,719)
Beginning balance at Mar. 31, 2021 50,398 102,775 (5,267) 0 (47,110)
Stock-based compensation   1,008      
Replacement awards issued in relation to acquisition   0      
Issuance of shares for stock purchase plan   789      
Repurchases of common stock     0    
Unrealized gain on available-for-sale securities, net of deferred taxes 0     0  
Net loss (2,609)       (2,609)
Ending balance at Jun. 30, 2021 $ 49,586 $ 104,572 $ (5,267) $ 0 $ (49,719)