Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
U.S. statutory income tax rate	21.00%	21.00%	21.00%	21.00%
State tax, net of U.S. federal tax benefit	2.80%	3.60%	3.80%	3.80%
Non-U.S. income taxes	0.30%	(0.80%)	0.40%	0.00%
Nondeductible operating expenses	0.90%	(0.50%)	0.30%	(0.40%)
Effective Income Tax Rate Reconciliation, Foreign Intangible Income Deduction, Percent	(1.30%)	0.00%	(0.80%)	0.00%
Effective Income Tax Rate Reconciliation, Limitation of Use, Percent	0.00%	(5.40%)	0.70%	0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Foreign Share-based Payment Arrangement, Percent	0.00%	(1.20%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Acquisition Related Expense, Percent	0.00%	(1.80%)	0.00%	0.00%
Research and development credit	(0.90%)	2.30%	(1.00%)	0.50%
Change in deferred tax measurement rate	0.10%	0.20%	(5.50%)	(0.10%)
Change in uncertain tax positions	0.20%	(1.00%)	0.20%	0.10%
Excess tax benefits from stock plans	(3.10%)	5.40%	(1.50%)	(0.20%)
Valuation allowance	(0.10%)	(0.40%)	34.30%	(1.50%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	0.00%	0.00%	0.00%	(13.60%)
Effective Income Tax Rate Reconciliation, Capital Income (Loss), Percent	0.00%	0.00%	(34.80%)	0.00%
Other	0.00%	(0.10%)	(0.30%)	(0.20%)
Effective income tax rate for continuing operations	19.90%	21.30%	16.80%	9.40%
Valuation allowance	$ 26,335	$ 26,510	$ 26,985
Loss and Other Credit Carryforward | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Valuation allowance		$ 300