Reverse Merger and Obligations to Transferors (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 26, 2016	Dec. 31, 2017	Dec. 31, 2016
Reverse Merger and Obligations to Transferors (Textual)
Deferred obligation payable in cash	$ 10,000,000
Obligations to transferors		$ 10,000,000	$ 10,000,000
Unpaid amount of deferred obligation received		10,000,000
Amortization of discount		634,000	645,000
Unamortized discount		$ 797,000	1,431,000
Ownership percentage		50.00%
Board of directors [Member]
Reverse Merger and Obligations to Transferors (Textual)
Deferred obligation payable in cash	$ 10,000,000		$ 10,000,000
Propel Media LLC [Member]
Reverse Merger and Obligations to Transferors (Textual)
Business combination description	(i) $10,000,000 to the Transferors ("Deferred Obligation"), which is payable in cash and/or stock not later than, June 30, 2019 and (ii) $6,000,000 payable in cash immediately after the payment of certain fees to the Lenders on or about January 28, 2019, (the "Deferred Payment").
Deferred payment, description	Deferred Obligation from an equity financing or from available working capital. The Company is required to use its reasonable best efforts to complete equity financings that would raise sufficient net proceeds to pay the $10,000,000 Deferred Obligation in cash to the Transferors on or before June 30, 2019 (the "Equity Financing Period"). In addition, the Company's board of directors, at least two times per year during the Equity Financing Period, is obligated to determine, in its sole and absolute discretion, the amount, if any, of the Company's working capital available to be used to pay all or a portion of the $10,000,000 Deferred Obligation in cash, taking into account such factors as it may deem relevant. If the Company's board of directors determines that there is available working capital to pay all or a portion of the $10,000,000 Deferred Obligation, the Company must use its reasonable best efforts to promptly obtain any required lender consent and, if such consent is obtained, must promptly pay to the Transferors an amount in cash equal to such available working capital. Finally, Jared Pobre, one of the former members of Propel Media, on behalf of the Transferors, is permitted to elect, during the ten day period following each December 31st during the Equity Financing Period, commencing December 31, 2016, to receive any unpaid amount of the $10,000,000 Deferred Obligation in shares of the Company's common stock.
Collectively owned common stock	154,125,921
Ownership percentage	61.70%
Kitara [Member]
Reverse Merger and Obligations to Transferors (Textual)
Collectively owned common stock	95,884,241
Ownership percentage	38.30%

Propel Media, Inc. 10-K