Summary of Significant Accounting Policies - Prior Period Adjustment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales	$ 92,953	$ 70,736	$ 60,564	$ 79,515	$ 104,141	$ 90,516	$ 93,491	$ 93,617	$ 303,768	$ 381,765	$ 403,627
Cost of Sales									143,921	183,633	182,074
OPERATING EXPENSES
Selling, general and administrative									131,827	177,378	169,717
Selling and marketing											0
General and administrative											0
Depreciation and amortization											0
Research and development									42,896	44,175	46,082
Operating Expenses									190,529	256,766	215,799
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales											403,627
Cost of Sales											175,282
OPERATING EXPENSES
Selling, general and administrative											0
Selling and marketing											116,920
General and administrative											47,652
Depreciation and amortization											18,313
Research and development											39,706
Operating Expenses											222,591
Restatement Adjustment | Depreciation and Amortization Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales											6,792
OPERATING EXPENSES
Selling, general and administrative											5,145
Selling and marketing											0
General and administrative											0
Depreciation and amortization											(18,313)
Research and development											6,376
Operating Expenses											(6,792)
Restatement Adjustment | Selling, General and Administrative Adjustment
OPERATING EXPENSES
Selling, general and administrative											164,572
Selling and marketing											(116,920)
General and administrative											(47,652)
Depreciation and amortization											0
Research and development											0
Operating Expenses											0
Restatement Adjustment | Software Maintenance Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales											0
Cost of Sales											0
Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales									218,587	289,679	320,584
Cost of Sales									98,864	133,246	130,876
Product | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales											311,102
Cost of Sales											124,802
Product | Restatement Adjustment | Depreciation and Amortization Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales											3,406
Product | Restatement Adjustment | Software Maintenance Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales											9,482
Cost of Sales											2,668
Service
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales									85,181	92,086	83,043
Cost of Sales									$ 45,057	$ 50,387	51,198
Service | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales											92,525
Cost of Sales											50,480
Service | Restatement Adjustment | Depreciation and Amortization Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales											3,386
Service | Restatement Adjustment | Software Maintenance Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales											(9,482)
Cost of Sales											$ (2,668)