Net (Loss) Income Per Share - Basic and Diluted Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net (Loss) Income Per Share
Net (loss) income	$ (3,355)	$ 2,424	$ (4,316)	$ (12,733)
Weighted-average shares outstanding	19,790,838	19,415,640	19,676,749	19,309,344
Dilutive effect of stock-based awards		331,725
Weighted-average shares used to compute diluted net (loss) income per share	19,790,838	19,747,365	19,676,749	19,309,344
Net (loss) income per share - Basic	$ (0.17)	$ 0.12	$ (0.22)	$ (0.66)
Net (loss) income per share - Diluted	$ (0.17)	$ 0.12	$ (0.22)	$ (0.66)