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Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 178,837 | $ 178,750
Less: Current portion | (44,047) | (18,262)
Long-term debt | 134,790 | 160,488
Unamortized debt issuance costs | 2,500 | 2,700
4.75% Convertible Senior Notes |  |
Debt Instrument [Line Items] |  |
Total debt | 131,506 | 131,291
Long-term debt, gross | 135,000 |
1.5% Convertible Unsecured Senior Notes |  |
Debt Instrument [Line Items] |  |
Total debt | 25,839 | 25,802
Long-term debt, gross | 26,000 |
Promissory note |  |
Debt Instrument [Line Items] |  |
Total debt | 17,534 | 17,534
Other debt and finance lease obligations |  |
Debt Instrument [Line Items] |  |
Total debt | 3,958 | 4,123
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Total debt | $ 0 | $ 0

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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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