CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 40	$ 40
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	47,081,000	46,880,000
Common stock, shares outstanding (in shares)	47,081,000	46,880,000