Net Income Per Share Attributable to Common Stockholders - Basic and Diluted Net Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net income attributable to common stockholders – basic		$ 8,881	$ 28,705	$ 56,604
Denominator:
Weighted average common shares outstanding – basic	51,760,000	51,760,000	52,278,000	50,184,000
Denominator:
Weighted average common shares outstanding – basic	51,760,000	51,760,000	52,278,000	50,184,000
Options to purchase common stock (in shares)	4,037,000		4,606,000	6,354,000
Restricted stock (in shares)	178,000		13,000	30,000
Employee stock purchase plan shares	52,000		11,000	61,000
Weighted average shares outstanding – diluted	56,027,000	56,027,000	56,908,000	56,629,000
Net income per share attributable to common stockholders – diluted (in usd per share)	$ 0.16	$ 0.16	$ 0.50	$ 1.00