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Restatement of Unaudited Consolidated Financial Statements and Additional Disclosure (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Errors impacted revenue	$ 71,405	$ 58,879
Gross profit	24,849	24,047
Income (loss)	5,196	5,999
Net income	4,139	$ 4,850
Errors Impacted Revenue [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Errors impacted revenue	2,000
Gross profit	1,200
Income (loss)	1,200
Net income	$ 1,100

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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