Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets (liabilities):
Deferred revenues	$ 2,943	$ 127
Share-based compensation	5,531	4,460
Inventory related items	2,874	2,441
Tax credit carryforwards	7,413	9,349
Reserves and accruals	5,983	3,960
Loss carryforwards	17,515	8,643
Other, net	81	1,307
Gross deferred tax assets	42,340	30,287
Valuation allowance	(1,256)	0
Total net deferred tax assets	41,084	30,287
Intangibles	(32,304)	(36,780)
Depreciation and amortization	(22,504)	(14,338)
Prepaid expenses	(12,563)	(11,161)
Total deferred tax liabilities	(67,371)	(62,279)
Net deferred tax liabilities	$ (26,287)	$ (31,992)