Description of Business - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales	$ 70,736	$ 90,516	$ 210,815	$ 277,624
Cost of Sales	34,438	39,744	101,748	123,093
Selling, general and administrative	30,163	45,880	96,523	131,909
Selling and marketing		0		0
General and administrative		0		0
Research and development	10,754	10,783	31,355	33,048
Total operating expenses	41,156	56,663	142,441	164,957
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		90,516		277,624
Cost of Sales		39,744		123,093
Selling, general and administrative		0		0
Selling and marketing		30,218		87,438
General and administrative		15,662		44,471
Research and development		10,783		33,048
Total operating expenses		56,663		164,957
Restatement Adjustment | Selling, general and administrative
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Selling, general and administrative		45,880		131,909
Selling and marketing		(30,218)		(87,438)
General and administrative		(15,662)		(44,471)
Research and development		0		0
Total operating expenses		0		0
Restatement Adjustment | Software Maintenance and Other Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		0		0
Cost of Sales		0		0
Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales	48,082	66,788	146,866	209,411
Cost of Sales	22,413	27,086	66,812	85,542
Product | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		63,641		200,434
Cost of Sales		26,495		83,632
Product | Restatement Adjustment | Software Maintenance and Other Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		3,147		8,977
Cost of Sales		591		1,910
Service
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales	22,654	23,728	63,949	68,213
Cost of Sales	$ 12,025	12,658	$ 34,936	37,551
Service | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		26,875		77,190
Cost of Sales		13,249		39,461
Service | Restatement Adjustment | Software Maintenance and Other Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales		(3,147)		(8,977)
Cost of Sales		$ (591)		$ (1,910)