Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	$ 6,692	$ 12,349	$ 15,301	$ 20,951
Cost of revenue - product
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	223	337	447	596
Cost of revenue - service
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	570	898	1,471	1,748
Research and development
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	761	2,069	2,280	3,272
Sales and marketing
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	50	345	308	1,042
General and administrative
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	3,488	6,178	8,289	10,541
Discontinued operations
Stock-based compensation expense
Stock-based compensation expense, including discontinued operations (in dollars)	$ 1,600	$ 2,522	$ 2,506	$ 3,752