Net Income Attributable to Common Stockholders Per Share - Computation of the Basic and Diluted Net Income Attributable to Common Stockholders 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 Income	$ 1,420	$ 2,670	$ 102	$ 6,540	$ 8,111	$ (839)	$ 4,192	$ 13,812
Less: net income allocated to participating securities	(1,074)			(5,094)			$ (4,192)	(11,171)
Net income attributable to common stockholders, basic and diluted	$ 346			$ 1,446				$ 2,641
Denominator
Weighted-average common shares outstanding, attributable to common stockholders, basic	108,322,433			28,700,005			57,534,080	28,551,126
Effect of stock options	5,314,945			2,358,752			4,561,195	2,212,461
Weighted-average common shares outstanding, attributable to common stockholders, diluted	113,637,377			31,058,757			62,095,275	30,763,586
Net income per share attributable to common stockholders, basic	$ 0.003198			$ 0.050354				$ 0.092443
Net income per share attributable to common stockholders, diluted	$ 0.003048			$ 0.046530				$ 0.085794