CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) [Parenthetical] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts (in dollars)	$ 100	$ 100
Common stock, par value (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,801,000	5,791,000
Common stock, shares outstanding (in shares)	5,801,000	5,791,000