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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 | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Principal amount | $ 67,062 | $ 52,750
Less: unamortized debt issuance costs | 4,978 | 4,348
Add: PIK interest accrued to the principal balance | 903 | 1,611
Long-term debt, net | 62,987 | 50,013
Less: Current portion of long-term debt | 2,750 | 4,135
Long-term debt, net (non-current) | 60,237 | 45,878
12% Term Loan, Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | 42,234 | 42,750
Less: unamortized debt issuance costs | 3,694 | 3,964
Add: PIK interest accrued to the principal balance | 553 | 479
Long-term debt, net | 39,093 | 39,265
Less: Current portion of long-term debt | 2,062 | 4,135
Long-term debt, net (non-current) | 37,031 | 35,130
12% Incremental Term Loan, Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | 14,828 |
Less: unamortized debt issuance costs | 918 |
Add: PIK interest accrued to the principal balance | 13 |
Long-term debt, net | 13,923 |
Less: Current portion of long-term debt | 688 |
Long-term debt, net (non-current) | 13,235 |
10% Promissory Notes, Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | 10,000 | 10,000
Less: unamortized debt issuance costs | 366 | 384
Add: PIK interest accrued to the principal balance | 337 | 1,132
Long-term debt, net | 9,971 | 10,748
Long-term debt, net (non-current) | $ 9,971 | $ 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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