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Basis of Presentation - Schedule of Effect of New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Inventories, net	$ 72,507	$ 72,860	$ 76,420
Liabilities
Deferred revenue	64	473	4,703
Stockholders' Equity
Retained earnings	$ 65,520	107,593	106,923
Before ASU 2014-09
Assets
Inventories, net			76,420
Liabilities
Deferred revenue			4,703
Stockholders' Equity
Retained earnings			$ 106,923
Accounting Standards Update 2014-09 | Adjustments due to ASU 2014-09
Assets
Inventories, net		(3,560)
Liabilities
Deferred revenue		(4,230)
Stockholders' Equity
Retained earnings		$ 670

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