Debt and Other Long-term Liabilities - Net Carrying Amount of Debt (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Feb. 10, 2019
Debt
Term loan debt	$ 16,750,000	$ 19,000,000
Unamortized deferred finance costs related to term loan	(112,000)	(179,000)
Total	16,638,000	18,821,000
Current portion of long-term debt	2,800,000	2,250,000
Long-term debt	13,838,000	16,571,000
Xcel Term Loan
Debt
Term loan debt	$ 16,750,000		$ 14,500,000
IM Term Loan
Debt
Term loan debt		$ 0

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.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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