Net (Loss) Income Per Share - Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net (loss) income	$ (7,699)	$ (8,916)	$ (4,997)	$ 1,266	$ (3,616)	$ (2,409)	$ (21,612)	$ (4,759)
Denominator for basic and diluted net (loss) income per share:
Weighted average common shares outstanding for basic (in shares)	41,877,232			22,273,633			36,179,795	22,153,946
Dilutive potential common stock outstanding:
Stock options and RSUs (in shares)	0			1,339,127			0	0
Convertible promissory note (in shares)	0			1,765,118			0	0
Weighted average common shares outstanding for diluted (in shares)	41,877,232			25,377,878			36,179,795	22,153,946
Basic net (loss) income per share (in dollars per share)	$ (180)			$ 60.00			$ (600)	$ (220)
Diluted net (loss) income per share (in dollars per share)	$ (180)			$ 50.00			$ (600)	$ (220)