Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Stockholder Note Receivable [Member]	(Accumulated Deficit) Retained Earnings [Member]
Balance (Predecessor [Member]) at Dec. 31, 2013		$ 31,307	$ 0	$ 12,891	$ 0	$ 18,416
Balance (in shares) (Predecessor [Member]) at Dec. 31, 2013			1,111
Distributions to stockholders | Predecessor [Member]		(8,181)	$ 0	0	0	(8,181)
Net income (loss) | Predecessor [Member]		(169)	0	0	0	(169)
Balance (Predecessor [Member]) at Dec. 31, 2014		22,957	$ 0	12,891	0	10,066
Balance (in shares) (Predecessor [Member]) at Dec. 31, 2014			1,111
Stockholder note receivable | Predecessor [Member]		(2,500)			(2,500)
Distributions to stockholders | Predecessor [Member]		(9,148)	$ 0	0	0	(9,148)
Net income (loss) | Predecessor [Member]		3,885	0	0	0	3,885
Balance (Predecessor [Member]) at Nov. 23, 2015		15,194	$ 0	12,891	(2,500)	4,803
Balance (in shares) (Predecessor [Member]) at Nov. 23, 2015			1,111
Elimination of Predecessor common stock, additional paid-in capital, and retained earnings | Predecessor [Member]		(15,194)	$ 0	(12,891)	2,500	(4,803)
Elimination of Predecessor common stock, additional paid-in capital, and retained earnings (in shares) | Predecessor [Member]			(1,111)
Adjustment to reflect STG Group, Inc. common stock, additional paid-in capital, and accumulated deficit (Note 1) | Predecessor [Member]	[1]	(1,011)	$ 0	6,939	0	(7,950)
Adjustment to reflect STG Group, Inc. common stock, additional paid-in capital, and accumulated deficit (Note 1) (in shares) | Predecessor [Member]	[1]		3,027,986
Issuance of common stock to Predecessor stockholders in conjunction with the Business Combination (Note 2) | Predecessor [Member]		82,632	$ 1	82,631	0	0
Issuance of common stock to Predecessor stockholders in conjunction with the Business Combination (Note 2) (in shares) | Predecessor [Member]			9,716,873
Issuance of common stock to Sponsor (Note 11) | Predecessor [Member]		10,950	$ 0	10,950	0	0
Issuance of common stock to Sponsor (Note 11) (in shares) | Predecessor [Member]			1,030,103
Common stock dividends declared	[2]	0	$ 1	(1)	0	0
Common stock dividends declared (in shares)	[2]		2,332,109
Stock-based compensation		28	$ 0	28	0	0
Net income (loss)		(254)	0	0	0	(254)
Balance (Predecessor [Member]) at Dec. 31, 2015		92,571	1	100,520	0	(7,950)
Balance at Dec. 31, 2015		92,345	$ 2	100,547	0	(8,204)
Balance (in shares) (Predecessor [Member]) at Dec. 31, 2015			13,774,962
Balance (in shares) at Dec. 31, 2015			16,107,071
Issuance of common stock to Sponsor (Note 11)		1,666	$ 0	1,666
Issuance of common stock to Sponsor (Note 11) (in shares)			462,778
Restricted stock awards		0	$ 0	0	0	0
Restricted stock awards (in shares)			33,600
Stock-based compensation		707	$ 0	707	0	0
Net income (loss)		(48,199)	0	0	0	(48,199)
Balance at Dec. 31, 2016		$ 46,519	$ 0	$ 102,920	$ 0	$ (56,403)
Balance (in shares) at Dec. 31, 2016			16,603,449

[1] Adjustment to reflect STG Group, Inc. common stock, additional paid-in capital, and accumulated deficit is net of 2,031,383 shares of common stock redeemed, which reduced common stock and additional paid-in capital by $21,594 (Note 11).

[2] The Company declared a dividend of one share of common stock for every 1.06 shares of common stock payable to stockholders of record immediately following the consummation of the Business Combination. Certain stockholders forfeited this right to receive the dividends as described further in Note 11.