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Debentures (Details Narrative) - USD ($)	3 Months Ended
Debentures (Details Narrative) - USD ($)	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Outstanding debentures			$ 12,700,000
Debentures [Member]
Interest expenses on debentures	$ 600,000	$ 1,900,000

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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