Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Research and development credit carryforward	$ 198	$ 216
Reserves and accruals not currently deductible	1,969	1,883
Deferred revenue	1,201	1,075
Domestic net operating loss carryforwards	832	892
Foreign net operating loss and credit carryforwards	3,146	2,551
Intangibles	4,402	5,388
Share-based compensation	1,259	1,500
Inventory obsolescence reserve	2,774	3,260
Other	810	1,135
Gross deferred tax assets	16,591	17,900
Valuation allowance for deferred tax assets	(3,172)	(2,447)
Deferred tax assets after valuation allowance	13,419	15,453
Gross deferred tax liabilities	(609)	(574)
Net deferred tax assets	$ 12,810	$ 14,879