Select Condensed Consolidated Balance Sheet Details - Inventories, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 5,862	$ 5,813
Work-in-process	805	952
Finished goods	43,613	39,758
Inventory, gross, total	50,280	46,523
Less reserve for excess and obsolete finished goods	(19,114)	(17,758)
Inventories, net	$ 31,166	$ 28,765

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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