Note 8 - Leases - Maturities of Lease Liabilities (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Remainder of: 2020, financing	$ 44,000
Remainder of: 2020, operating	261,000
Remainder of: 2020, total	305,000
2021, financing	176,000
2021, operating	1,020,000
2021, total	1,196,000
2022, financing	170,000
2022, operating	1,011,000
2022, total	1,181,000
2023, financing	96,000
2023, operating	1,002,000
2023, total	1,098,000
2024, financing	53,000
2024, operating	856,000
2024, total	909,000
Thereafter, financing	25,000
Thereafter, operating	8,979,000
Therafter, total	9,004,000
Total undiscounted future minimum lease cash payments, financing	564,000
Total undiscounted future minimum lease cash payments, operating	13,129,000
Total undiscounted future minimum lease cash payments, Total	13,693,000
Present value discount, financing	(11,000)
Present value discount, operating	(4,430,000)
Present value discount, Total	(4,441,000)
Lease liability, financing	552,618	$ 438,580
Operating lease liabilities	8,699,301	$ 9,105,503
Lease liability, Total	$ 9,252,000