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Long-term debts, net - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 03, 2017 | Jan. 19, 2017 | Dec. 08, 2015 | Nov. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Nov. 02, 2017 | Mar. 31, 2017 | Feb. 01, 2017 | Feb. 22, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 65,000 | $ 52,750 |  |  |  |  |
Long-term debt |  |  |  |  |  | 62,963 | 50,013 |  |  |  |  |
Warrants issued in relation to term loan |  |  |  |  | $ 492 |  | 492 | $ 1,586 |  |  |  |
Proceeds from exercise of warrants by certain warrant holders |  |  |  |  |  | 3,485 |  |  |  |  |  |
Put rights classified into current liabilities |  |  |  |  |  | $ 32,779 | $ 26,159 |  |  |  |  |
Promissory notes |  |  | $ 10,000 |  |  |  |  |  |  |  |  |
Promissory notes, interest rate |  |  | 10.00% |  |  | 10.00% |  |  |  |  |  |
Number of Series B Preferred Stock issued for every $1.0 million promissory note |  |  |  |  |  | 0 | 0 |  |  |  |  |
Par value of share |  |  |  |  |  | $ 0.0001 | $ 0.0001 |  |  |  |  |
Interest paid |  |  |  |  |  | $ 6,706 | $ 3,795 | $ 3 |  |  |  |
Closing stock market price |  |  |  |  |  | $ 4.40 |  |  |  |  |  |
Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  |  |  |  |  | $ 284 | 350 |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of Series B Preferred Stock issued for every $1.0 million promissory note |  |  | 100 |  |  |  |  |  |  |  |  |
Par value of share |  |  | $ 0.0001 |  |  |  |  |  |  |  |  |
Amount of increment pursuant to issue of preferred shares |  |  | $ 1,000 |  |  |  |  |  |  |  |  |
Preferred stock, shares issued upon conversion |  |  | 50 |  |  |  |  |  |  |  |  | 22,548,100
Michael Brauser, Chairman of the Board [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | 4,460 | 4,453 |  |  |  |  |
Promissory notes |  |  | $ 4,000 |  |  |  |  |  |  |  |  |
Number of Series B Preferred Stock issued for every $1.0 million promissory note |  |  | 400 |  |  |  |  |  |  |  |  |
Interest paid |  |  |  |  |  | 426 |  |  |  |  |  |
Another Investor [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | 1,115 | 1,113 |  |  |  |  |
Promissory notes |  |  | $ 1,000 |  |  |  |  |  |  |  |  |
Number of Series B Preferred Stock issued for every $1.0 million promissory note |  |  | 100 |  |  |  |  |  |  |  |  |
Interest paid |  |  |  |  |  | 107 |  |  |  |  |  |
Frost Gamma Investments Trust [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | 5,574 | $ 5,566 |  |  |  |  |
Promissory notes |  |  | $ 5,000 |  |  |  |  |  |  |  |  |
Number of Series B Preferred Stock issued for every $1.0 million promissory note |  |  | 500 |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common shares upon exercise of warrants, shares |  |  |  |  |  |  | 1,069,728 | 20,122 |  |  |  |
Whitehorse Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares that warrants to purchase |  |  | 200,000 |  | 100,000 | 1,161,769 |  |  |  |  |  |
Warrants expiration period |  |  |  |  |  | 10 years |  |  |  |  |  |
Exercise price of warrants |  |  | $ 8.00 |  | $ 5.08 | $ 3.00 |  |  | $ 5.08 |  |  |
Warrants expiration date |  |  |  |  | Sep. 30, 2026 |  |  |  |  |  |  |
Warrants issued in relation to term loan |  |  |  |  | $ 492 |  |  |  |  |  |  |
Number of warrants to purchase common stock | 300,000 |  | 200,000 |  | 100,000 |  |  |  |  |  |  |
Proceeds from exercise of warrants by certain warrant holders | $ 900 |  |  |  |  | $ 3,485 |  |  |  |  |  |
Minimum share price to transfer common stock underlying warrants | $ 4.50 |  |  |  |  |  |  |  |  |  |  |
Warrants exercise, lock-up period | 120 days |  |  |  |  |  |  |  |  |  |  |
Percentage of shares to daily trading volume | 5.00% |  |  |  |  |  |  |  |  |  |  |
Share price agreed upon warrant terms | $ 4.50 |  |  |  |  |  |  |  |  |  |  |
Fair value of warrant liability |  |  |  |  |  |  | $ 492 | $ 1,586 |  |  |  |
Gain on amendment of warrants |  |  |  |  |  | 350 |  |  |  |  |  |
Whitehorse Warrants [Member] | Put Rights [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Put rights classified into current liabilities |  |  |  |  |  | $ 1,350 |  |  |  |  |  |
Whitehorse Warrants [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common shares upon exercise of warrants, shares |  |  |  | 300,000 |  | 300,000 |  |  |  |  |  |
Proceeds from exercise of warrants by certain warrant holders |  |  |  | $ 900 |  |  |  |  |  |  |  |
Promissory Note Shares [Member] | Promissory Note [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Fair value of promissory note shares |  |  | $ 413 |  |  |  |  |  |  |  |  |
Closing stock market price |  |  | $ 8.45 |  |  |  |  |  |  |  |  |
Promissory Note Shares [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of Series B Preferred Stock issued for every $1.0 million promissory note |  |  | 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 are due on the last day of each quarter |  |  |  |  |  |
Debt instrument, periodic principal payment |  |  |  |  |  | $ 563 |  |  |  |  |  |
Debt instrument, percentage of excess cash flow to be paid |  |  |  |  |  | 50.00% |  |  |  |  |  |
Debt instrument, period with prepayment premium |  |  |  |  |  | four years |  |  |  |  |  |
Additional amount reclassified into current portion of long-term debt |  |  |  |  |  |  | 1,885 |  |  |  |  |
Non-current portion of long-term debt |  |  |  |  |  |  |  |  |  | $ 1,885 |  |
Prepayment refused resulting from excess cash flow |  |  |  |  |  | $ 4,608 |  |  |  |  |  |
Term Loans, PIK interest rate |  |  |  |  |  | 1.00% |  |  |  |  |  |
Unamortized debt discount |  |  |  |  |  | $ 897 | $ 1,679 |  |  |  |  |
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% |  |  |  |  |  |
Term Loan [Member] | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term Loans, Interest rate |  |  |  |  |  | 9.50% |  |  |  |  |  |
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 |  |  |  |  |  | $ 688 |  |  |  |  |  |
Term Loans, PIK interest rate |  | 1.00% |  |  |  |  |  |  |  |  |  |
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 [Member] | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term Loans, Interest rate |  | 9.50% |  |  |  |  |  |  |  |  |  |

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