Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Taxes at federal statutory rate		$ (6,028)	$ (655)	$ 2,888
State taxes, net of federal benefit		(236)	(90)	(29)
Effect of tax rate differential for foreign subsidiary		(2,641)	(3,570)	(2,531)
Valuation allowance, including tax benefits of stock activity		3,894	4,698	(239)
Foreign taxes on unremitted earnings	$ 1,590	2,085		0
Stock-based compensation		134	621	460
Foreign withholding taxes		180	0	0
Return to provision adjustments		1,131	536	(920)
Subpart F income inclusion		5,914	1,167	2,446
Other		170	49	77
Tax provision		$ 4,603	$ 4,346	$ 2,152

Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Including Stock Activity

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Income Tax Reconciliation, Return to Provision Adjustments

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Income Tax Reconciliation, Subpart F Income Inclusion

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a),(b)
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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