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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Allowances for doubtful accounts $ 430 $ 300
Provision for obsolescence $ 263 $ 388
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 75,000,000 75,000,000
Common stock, shares outstanding (in shares) 34,409,912 34,289,222
Common stock, shares issued (in shares) 34,409,912 34,289,222