Financial Statement Line Items as Filed and as Adjusted Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ (3,483)	$ (4,344)	$ 47,336	$ (6,254)	$ (1,822)	$ (1,174)	$ (1,343)	$ (3,893)		$ 33,255	$ (8,232)
Sales, marketing and support										33,434	30,571
Accumulated earnings (deficit)	19,538				(15,397)					19,538	(15,397)
Current contract assets	(1,458)				(3,566)					(1,458)	(3,566)
Non-current contract assets	(3,408)				(6,971)					(3,408)	(6,971)
Current contract liabilities	(4,443)				(7,647)					(4,443)	(7,647)
Long-term contract liabilities	(5,476)				(9,070)					(5,476)	(9,070)
Non-current deferred income tax asset	$ (45)				$ (226)					(45)	(226)
Revenue recognized										2,736	4,670
Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of product sales										$ 42,887	$ 39,510
Implementation of ASC 606 | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)									$ (250)
Sales, marketing and support									15
Accumulated earnings (deficit)												$ 1,680
Current contract assets												2,132
Non-current contract assets												3,110
Current contract liabilities												2,970
Long-term contract liabilities												4,018
Non-current deferred income tax asset												$ 66
Implementation of ASC 606 | Product | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Product sales									1,350
Cost of product sales									$ 1,591