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Long-term debts, net - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 09, 2018 | Mar. 26, 2018 | Nov. 03, 2017 | Jan. 19, 2017 | Nov. 30, 2017 | Sep. 30, 2018 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Nov. 02, 2017 | Feb. 01, 2017 | Dec. 08, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  | $ 65,000 |  |  |
Long-term payment obligations |  |  |  |  |  |  |  |  | 62,963 |  |  |
Promissory notes |  |  |  |  |  |  |  |  |  |  |  | $ 10,000
Promissory notes, interest rate |  |  |  |  |  |  |  |  |  |  |  | 10.00%
Unamortized debt issuance costs |  |  |  |  |  |  |  |  | 3,737 |  |  |
Proceeds from exercise of warrants by certain warrant holders |  |  |  |  |  |  |  | $ 0 | 3,485 |  |  |
Put rights classified into current liabilities |  |  |  |  |  |  |  | $ 33,365 | $ 32,779 |  |  |
Common stock, par value (in dollars per share) |  |  |  |  |  |  |  | $ 0.0005 | $ 0.0005 |  |  |
Reduction in value of puttable option classified as liability |  |  |  |  |  |  |  | $ 200 |  |  |  |
Preferred stock, shares issued (in shares) |  |  |  |  |  |  |  | 0 | 0 |  |  |
Promissory Note |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt issuance costs |  | $ 284 |  |  |  |  |  |  |  |  |  |
Repayments of debt |  | 11,425 |  |  |  |  |  |  |  |  |  |
Michael Brauser, Chairman of the Board |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term payment obligations |  |  |  |  |  |  |  |  | $ 4,460 |  |  |
Promissory notes |  |  |  |  |  |  |  |  |  |  |  | $ 4,000
Interest paid |  |  |  |  |  |  | $ 426 |  | 426 |  |  |
Another Investor |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term payment obligations |  |  |  |  |  |  |  |  | 1,115 |  |  |
Promissory notes |  |  |  |  |  |  |  |  |  |  |  | 1,000
Interest paid |  |  |  |  |  |  | 107 |  | 107 |  |  |
Frost Gamma Investments Trust |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term payment obligations |  |  |  |  |  |  |  |  | 5,574 |  |  |
Promissory notes |  |  |  |  |  |  |  |  |  |  |  | 5,000
Interest paid |  |  |  |  |  |  | 533 |  | 533 |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock issued |  |  |  |  |  |  |  | 2,700,000 |  |  |  |
Additional Paid-in Capital |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reduction in value of puttable option classified as liability |  |  |  |  |  | $ 200 |  | $ 200 |  |  |  |
Whitehorse Warrants |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants to purchase common stock (in shares) |  |  | 300,000 |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) |  |  |  |  |  |  |  | $ 3.00 |  | $ 5.08 |  |
Proceeds from exercise of warrants by certain warrant holders |  |  | $ 900 |  |  |  |  |  | 3,484 |  |  |
Warrants exercise, lock-up period |  |  | 120 days |  |  |  |  |  |  |  |  |
Percentage of shares to daily trading volume |  |  | 5.00% |  |  |  |  |  |  |  |  |
Share price agreed upon warrant terms (in dollars per share) |  |  | $ 4.50 |  |  |  |  |  |  |  |  |
Minimum share price to transfer common stock underlying warrants (in dollars per share) | $ 3.8334 |  | $ 4.50 |  | $ 4.5 |  |  |  |  |  |  |
Gain on amendment of warrants |  |  |  |  |  |  |  |  | 350 |  |  |
Whitehorse Warrants | Put Rights |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | 3.8334 |  |  |  |  |  |  |  |  |  |  |
Put rights classified into current liabilities |  |  |  |  |  |  |  |  | $ 1,350 |  |  |
Whitehorse Warrants | Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of share options, exercised (in shares) |  |  |  |  | 300,000 |  |  |  |  |  |  |
Proceeds from exercise of warrants by certain warrant holders |  |  |  |  | $ 900 |  |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  |  |  |  |  |  | $ 45,000
Prepayment terms |  |  |  |  |  |  |  |  | 4 years |  |  |
Debt instrument, unamortized discount |  |  |  |  |  |  |  | $ 669 | $ 897 |  |  |
Incremental Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | $ 15,000 |  |  |  |  |  |  |  |
Long-term payment obligations |  |  |  |  |  |  |  |  |  |  | $ 14,039 |
Debt issuance costs |  |  |  |  |  |  |  |  |  |  | $ 961 |
Term Loans |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, PIK interest rate |  |  |  | 1.00% |  |  |  |  |  |  |  |
Debt instrument, periodic principal payment |  |  |  |  |  |  | $ 688 |  |  |  |  |
Unamortized debt issuance costs |  | 3,136 |  |  |  |  |  |  |  |  |  |
Repayments of line of credit |  | 55,586 |  |  |  |  |  |  |  |  |  |
Prepayment refused resulting from excess cash flow |  | 2,818 |  |  |  |  |  |  |  |  |  |
Term Loans | Interest Rate Floor |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, interest rate |  |  |  | 0.50% |  |  |  |  |  |  |  |
Term Loans | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, interest rate |  |  |  | 10.50% |  |  |  |  |  |  |  |
Term Loans | Base Rate |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, interest rate |  |  |  | 9.50% |  |  |  |  |  |  |  |
Refinanced Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  | 70,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amortization per quarter |  | 875 |  |  |  |  |  |  |  |  |  |
Debt related commitment fees and debt issuance costs |  | $ 193 |  |  |  |  |  |  |  |  |  |
Refinanced Term Loan | Interest Rate Floor |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, interest rate |  | 0.50% |  |  |  |  |  |  |  |  |  |
Refinanced Term Loan | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, interest rate |  | 7.00% |  |  |  |  |  |  |  |  |  |
Refinanced Term Loan | Base Rate |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan, interest rate |  | 6.00% |  |  |  |  |  |  |  |  |  |
HIG Whitehorse SMAABFLP | Whitehorse Warrants |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ 3.00 |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares that warrants to purchase (in shares) | 46,667 |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ 0.0005 |  |  |  |  |  |  |  |  |  |  |
HIG Whitehorse SMA Holdings I LLC | Whitehorse Warrants |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ 3.00 |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares that warrants to purchase (in shares) | 66,666 |  |  |  |  |  |  |  |  |  |  |
Whitehorse Finance Inc | Whitehorse Warrants |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ 3.00 |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares that warrants to purchase (in shares) | 186,667 |  |  |  |  |  |  |  |  |  |  |
Spinoff | Red Violet, Inc. | Warrant |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock issued | 40,000 |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of private placement | $ 200 |  |  |  |  |  |  |  |  |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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