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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   1,051    
Cancellation Of Shares For Payment Of Withholding Tax   (167)    
Issuance of shares for stock purchase plan   287    
Net loss (2,521)     (2,521)
Ending balance at Mar. 31, 2022 42,823 108,142 (5,364) (59,955)
Beginning balance at Dec. 31, 2022 39,825 111,282 (5,364) (66,093)
Stock-based compensation   1,874    
Cancellation Of Shares For Payment Of Withholding Tax   (678)    
Issuance of shares for stock purchase plan   137    
Net loss (2,858)     (2,858)
Ending balance at Mar. 31, 2023 $ 38,300 $ 112,615 $ (5,364) $ (68,951)