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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 Deficit
Beginning balance at Dec. 31, 2021 $ 44,173 $ 106,971 $ (5,364) $ (57,434)
Stock-based compensation   2,079    
Issuance of shares for stock purchase and option plans   136    
Net loss (4,140)     (4,140)
Ending balance at Jun. 30, 2022 42,248 109,186 (5,364) (61,574)
Beginning balance at Mar. 31, 2022 42,823 108,142 (5,364) (59,955)
Stock-based compensation   1,028    
Issuance of shares for stock purchase and option plans   16    
Net loss (1,619)     (1,619)
Ending balance at Jun. 30, 2022 42,248 109,186 (5,364) (61,574)
Beginning balance at Dec. 31, 2022 39,825 111,282 (5,364) (66,093)
Stock-based compensation   2,842    
Common stock withheld related to net share settlement of equity awards   (690)    
Issuance of shares for stock purchase and option plans   165    
Net loss (5,063)     (5,063)
Ending balance at Jun. 30, 2023 37,079 113,599 (5,364) (71,156)
Beginning balance at Mar. 31, 2023 38,300 112,615 (5,364) (68,951)
Stock-based compensation   968    
Common stock withheld related to net share settlement of equity awards   (12)    
Issuance of shares for stock purchase and option plans   28    
Net loss (2,205)     (2,205)
Ending balance at Jun. 30, 2023 $ 37,079 $ 113,599 $ (5,364) $ (71,156)