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Equity Awards and Instruments - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		$ 33,051	$ 8,091	$ 7,882
Stock-based compensation expense accrued		6,835
Cost of Revenues
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		2,939	522	362
Cost of Revenues \| Subscriptions and licenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		960	115	44
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		12,105	3,107	2,971
Selling and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		6,692	2,210	2,337
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		10,355	2,137	2,168
Restricted Stock and Restricted Stock Units (RSUs)
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense	$ 15,445	15,102	0	0
Stock option expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		6,858	6,342	4,808
Restricted stock and RSU expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		4,248	1,749	3,074
Stock grants expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		319	0	0
Bonus Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total pre-tax expense		$ 6,524	$ 0	$ 0