CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets
Accounts receivable, allowance for credit loss	$ 211	$ 116
Inventory obsolescence reserve	773	861
Accumulated depreciation and amortization	$ 34,826	$ 34,057
Stockholders’ equity
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	67,867,500	66,767,450
Common stock, outstanding (in shares)	67,867,500	66,767,450