Summary of Significant Accounting Policies - Numerator and Denominator of the Basic and Diluted Net Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income - basic			$ 15,566
Net income - diluted	$ 10,840	$ 14,181	$ 15,566
Weighted average shares outstanding - basic (in shares)	63,650	62,249	63,000	60,990	58,507
Dilutive common shares equivalents - Warrants to purchase common stock (in shares)			157
Weighted average shares outstanding - diluted (in shares)	65,927	65,678	64,349	60,990	58,507
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common stock equivalents - Incremental common shares attributable to dilutive effect (in shares)			1,129
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common stock equivalents - Incremental common shares attributable to dilutive effect (in shares)			62
Awards to be granted under the ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive common stock equivalents - Incremental common shares attributable to dilutive effect (in shares)			1