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Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 178,585 | $ 183,537
Less: Current portion | (18,231) | (17,778)
Long-term debt | 160,354 | 165,759
Unamortized debt issuance costs | 3,100 | 600
2026 Notes |  |
Debt Instrument [Line Items] |  |
Total debt | 130,851 | 0
Long-term debt, gross | 135,000 |
2023 Notes |  |
Debt Instrument [Line Items] |  |
Total debt | 25,728 | 143,242
Unamortized debt issuance costs | 241 | 1,819
Long-term debt, gross | 25,969 | 157,369
Promissory note |  |
Debt Instrument [Line Items] |  |
Total debt | 17,534 | 17,095
Other debt and finance lease obligations |  |
Debt Instrument [Line Items] |  |
Total debt | 4,472 | 4,792
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Total debt | $ 0 | $ 18,408

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: 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=120400017&loc=d3e572229-122910 Reference 3: 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=120391452&loc=d3e13212-122682 Reference 4: 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=120398452&loc=d3e534808-122878 + Details
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