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Long-term debts, net - Schedule of Long-term Debts, Including Promissory Notes Payable to Certain Shareholders, Net (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Debt Instrument [Line Items] |  |
Principal amount | $ 65,000 | $ 52,750
Less: unamortized debt issuance costs | (3,737) | (4,348)
Add: PIK interest accrued to the principal balance | 1,700 | 1,611
Long-term debt, net | 62,963 | 50,013
Less: Current portion of long-term debt | (2,750) | (4,135)
Long-term debt, net (non-current) | 60,213 | 45,878
12% Term Loan, Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | 40,688 | 42,750
Less: unamortized debt issuance costs | (2,753) | (3,964)
Add: PIK interest accrued to the principal balance | 542 | 479
Long-term debt, net | 38,477 | 39,265
Less: Current portion of long-term debt | (2,062) | (4,135)
Long-term debt, net (non-current) | 36,415 | 35,130
12% Incremental Term Loan, Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | 14,312 |
Less: unamortized debt issuance costs | (672) |
Add: PIK interest accrued to the principal balance | 9 |
Long-term debt, net | 13,649 |
Less: Current portion of long-term debt | (688) |
Long-term debt, net (non-current) | 12,961 |
10% Promissory Notes, Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | 10,000 | 10,000
Less: unamortized debt issuance costs | (312) | (384)
Add: PIK interest accrued to the principal balance | 1,149 | 1,132
Long-term debt, net | 10,837 | 10,748
Long-term debt, net (non-current) | $ 10,837 | $ 10,748

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 + Details
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