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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% |  |  |  |  |  |  |

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