Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net (loss) income – basic and diluted	$ (22,982)	$ 8,248
Shares used in computing net income (loss) per share
Weighted-average common shares outstanding - basic (in shares)	22,872	21,512
Effect of dilutive securities (in shares)	0	18
Weighted-average common shares outstanding - diluted (in shares)	22,872	21,530
(Loss) earnings per common share
(Loss) earnings per share — basic (in dollars per share)	$ (1.00)	$ 0.38
(Loss) earnings per share — diluted (in dollars per share)	$ (1.00)	$ 0.38
Antidilutive shares (in shares)	200	1,400