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Long-term Debt - Summary of Debt (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 20, 2018
--- | --- | --- | --- | ---
Line of Credit Facility [Line Items] |  |  |  |
Long-term debt, excluding current maturities | $ 60,495,000 | $ 71,554,000 |  |
Current portion of long-term debt | 875,000 | 4,000,000 |  |
Long-term debt outstanding | 61,370,000 | 75,554,000 |  |
ABL Line Of Credit, Due December 20, 2021 | Revolving Line of Credit |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Long-term debt, excluding current maturities | 49,037,000 | 59,221,000 |  |
Principal amount of debt | 100,000,000 |  |  |
Term Loan |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Principal amount of debt |  |  | $ 20,000,000 | $ 20,000,000
Term Loan | Secured Debt |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Long-term debt, excluding current maturities | 11,458,000 | 12,333,000 |  |
Long-term debt outstanding | 12,300,000 | $ 16,300,000 |  |
Principal amount of debt | $ 20,000,000 |  |  | $ 20,000,000

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&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(a)(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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: 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 + Details
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