Income Taxes - Significant Components of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets (liabilities):
Deferred revenues	$ 4,129	$ 2,943
Share-based compensation	6,483	5,531
Inventory related items	3,507	2,874
Tax credit carryforwards	13,472	7,413
Reserves and accruals	5,712	5,983
Loss carryforwards	9,484	17,515
Lease liability	15,471	0
Other, net	543	81
Gross deferred tax assets	58,801	42,340
Valuation allowance	(1,186)	(1,256)
Total net deferred tax assets	57,615	41,084
Intangibles	(18,941)	(32,304)
Depreciation and amortization	(35,941)	(22,504)
Prepaid expenses	(13,395)	(12,563)
Right-of-use assets	(14,286)	0
Total deferred tax liabilities	(82,563)	(67,371)
Net deferred tax liabilities	$ (24,948)	$ (26,287)