Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Beginning balance at Dec. 31, 2018	$ 182,596	$ 215	$ 183,290	$ (909)
Balance, shares at Dec. 31, 2018		29,545
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(92,800)		(92,800)
Unrealized loss on marketable securities, net of income tax expense	6			6
Gain (loss) on derivative securities, effective portion, net of income tax (benefit) expense	(223)			(223)
Foreign currency translation adjustment, including income tax expense (benefit)	189			189
Stock-based compensation expense	619	$ 837	(218)
Common stock issued under equity compensation plan, net of shares withheld for tax payments, in shares		135
Common stock issued under equity compensation plan, net of shares withheld for tax payments	(32)	$ (32)
Common stock issued under employee stock purchase plan, shares		101
Common stock issued under employee stock purchase plan	241	$ 241
Balance, shares at Dec. 31, 2019		29,781
Ending balance at Dec. 31, 2019	90,596	$ 1,261	90,272	(937)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	59,848		59,848
Unrealized loss on marketable securities, net of income tax expense	(4)			(4)
Foreign currency translation adjustment, including income tax expense (benefit)	955			955
Stock-based compensation expense	3,734	$ 3,734
Common stock issued under equity compensation plan, net of shares withheld for tax payments, in shares		455
Common stock issued under equity compensation plan, net of shares withheld for tax payments	(2,190)	$ (2,190)
Common stock issued under employee stock purchase plan, shares		94
Common stock issued under employee stock purchase plan	256	$ 256
Balance, shares at Dec. 31, 2020		30,330
Ending balance at Dec. 31, 2020	153,195	$ 3,061	150,120	14
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	30,404		30,404
Unrealized loss on marketable securities, net of income tax expense	(4)			(4)
Foreign currency translation adjustment, including income tax expense (benefit)	(165)			(165)
Stock-based compensation expense	1,172	$ 1,172
Common stock issued under equity compensation plan, net of shares withheld for tax payments, in shares		246
Common stock issued under equity compensation plan, net of shares withheld for tax payments	(2,057)	$ (2,057)
Balance, shares at Mar. 31, 2021		30,576
Ending balance at Mar. 31, 2021	182,545	$ 2,176	180,524	(155)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(22,431)		(22,431)
Unrealized loss on marketable securities, net of income tax expense	(4)			(4)
Foreign currency translation adjustment, including income tax expense (benefit)	(368)			(368)
Stock-based compensation expense	6,262	$ 6,262
Common stock issued under equity compensation plan, net of shares withheld for tax payments, in shares		646
Common stock issued under equity compensation plan, net of shares withheld for tax payments	(2,441)	$ (2,441)
Common stock issued under employee stock purchase plan, shares		46
Common stock issued under employee stock purchase plan	486	$ 486
Balance, shares at Mar. 31, 2022		31,268
Ending balance at Mar. 31, 2022	$ 164,049	$ 6,483	$ 158,093	$ (527)