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Long-term debts, net - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended		12 Months Ended
	Jan. 19, 2017	Dec. 08, 2015	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Mar. 31, 2017	Feb. 01, 2017	Feb. 22, 2016
Debt Instrument [Line Items]
Principal amount			$ 65,688		$ 52,750
Long-term debt			$ 62,848		$ 50,013
Promissory notes		$ 10,000
Promissory note, interest rate		10.00%	10.00%
Interest paid			$ 4,940	$ 3,795
Series B Preferred Stock [Member]
Debt Instrument [Line Items]
Number of shares granted per $1.0 million promissory notes		100	0		0
Amount of increment pursuant to issue of preferred shares		$ 1,000
Preferred stock, shares issued upon conversion								50
Michael Brauser, Chairman of the Board [Member]
Debt Instrument [Line Items]
Long-term debt			$ 4,349
Promissory notes		4,000
Interest paid			426
Another Investor [Member]
Debt Instrument [Line Items]
Long-term debt			1,087
Promissory notes		1,000
Interest paid			107
Frost Gamma Investments Trust [Member]
Debt Instrument [Line Items]
Long-term debt			5,437
Promissory notes		$ 5,000
Interest paid			533
Fluent Acquisition [Member] \| Cash and Cash Equivalents [Member]
Debt Instrument [Line Items]
Financial covenant compliance, minimum cash and cash equivalent balance			$ 2,000
Whitehorse Warrants [Member]
Debt Instrument [Line Items]
Number of common stock called by warrants			300,000
Exercise price of warrants			$ 5.0829
Promissory Note Shares [Member]
Debt Instrument [Line Items]
Fair value of promissory note shares			$ 413
Market price of common stock		$ 8.45
Promissory Note Shares [Member] \| Series B Preferred Stock [Member]
Debt Instrument [Line Items]
Number of shares granted per $1.0 million promissory notes		1,000
Term Loan [Member]
Debt Instrument [Line Items]
Term Loan		$ 45,000
Term Loan, expiry period		5 years
Debt instrument, payment term			Payments of principal in the amount of $563 each were due on the last day of each quarter, prior to Amendment No.3
Debt instrument, periodic principal payment, prior to Amendment No.3			$ 563		$ 563
Debt instrument, percentage of excess cash flow to be paid			50.00%
Debt instrument, period with prepayment premium			First four years
Current portion of long-term debt					$ 1,885
Non-current portion of long-term debt						$ 1,885
Term Loan [Member] \| Interest Rate Floor [Member]
Debt Instrument [Line Items]
Term Loans, Interest rate			0.50%
Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Term Loans, Interest rate			10.50%
Incremental Term Loan [Member]
Debt Instrument [Line Items]
Principal amount	$ 15,000
Long-term debt							$ 14,039
Debt issuance costs							$ 961
Term Loans [Member]
Debt Instrument [Line Items]
Debt instrument, periodic principal payment, prior to Amendment No.3			$ 688
Debt Instrument, maturity date	Dec. 08, 2020
Term Loans [Member] \| Interest Rate Floor [Member]
Debt Instrument [Line Items]
Term Loans, Interest rate	0.50%
Term Loans [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Term Loans, Interest rate	10.50%
Term Loans, PIK interest rate	1.00%
Term Loans [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Term Loans, Interest rate	9.50%