Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Components of provision for income taxes
Income tax expense	$ 1,059	$ 471
Current foreign tax expense	315	129
Current state tax expense	$ 744	$ 342

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
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