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Note 4 - Leases (Details Textual)
12 Months Ended
Dec. 31, 2020
USD ($)
Operating Lease, Payments $ 1,113,504
Finance Lease, Principal Payments 43,770
Operating Expense [Member]  
Operating Lease, Expense 1,290,362
Other Nonoperating Income (Expense) [Member]  
Operating Lease, Expense $ 114,792