Business Combination (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Combination Disclosure [Line Items]
Cash consideration per Stock Purchase Agreement		$ 68,000
Net Working Capital And Other Cash Consideration Adjustments		3,400
Payments to Acquire Notes Receivable		$ 2,500
Predecessor [Member]
Business Combination Disclosure [Line Items]
Increased Amortization	$ 1,500		$ 4,300
Increased Interest Expense	2,100		6,100
Decreased Income Tax Benefit	$ 1,300		$ 3,000
Private Placement [Member] | Common Stock [Member]
Business Combination Disclosure [Line Items]
Business Acquisition, Share Price		$ 8.50
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 5,600
Conversion of Stock, Shares Issued		658,513
STG Group Holdings Inc [Member] | Common Stock [Member]
Business Combination Disclosure [Line Items]
Stock Issued During Period, Shares, Acquisitions		8,578,199
Stock Issued During Period, Shares, Share-based Compensation, Forfeited		445,161
Stock Issued During Period, Shares, Share-based Compensation, Gross		35,000
Business Acquisition, Share Price		$ 8.50