Annual report pursuant to Section 13 and 15(d)

Schedule of Cash, Cash Equivalents and Restricted Cash (Details)

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Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash and Cash Equivalents [Abstract]      
Cash and cash equivalents $ 21,029,806 $ 12,432,481 $ 22,170,000
Restricted cash included in current/long term assets 250,000 336,000 586,000
Cash, cash equivalents and restricted cash in the statements of cash flows $ 21,280,000 $ 12,768,000 $ 22,756,000