Long-Term Debt (Details) - Long-term debt - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, including current portion	$ 3,440,000	$ 3,530,000
Less portion due within one year	2,940,000	3,030,000
Net long-term debt	500,000	500,000
Total debt	3,461,000	3,582,000
Less deferred financing costs and debt discount	21,000	52,000
8¼% Limited Convertible Senior Subordinated Notes Due 2012 [Member]
Debt Instrument [Line Items]
Long-term debt, including current portion	302,000	302,000
9½% Subordinated Debentures Due 2012 [Member]
Debt Instrument [Line Items]
Long-term debt, including current portion	220,000	220,000
Revolving Credit Line Related Party [Member]
Debt Instrument [Line Items]
Long-term debt, including current portion	1,439,000	1,189,000
Related Party Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, including current portion	1,000,000	1,000,000
Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, including current portion	$ 500,000	$ 871,000

Total debt before deduction of deferred financing costs.

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Amount of amortization expense attributable to debt issuance costs.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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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, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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