Note 11 - Uncertainties (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Impairment of Notes Receivable	$ 833,000	$ 897,000
S&L Note [Member]
Impairment of Notes Receivable	833,000	$ 0
S&L Note [Member] | COVID 19 [Member]
Impairment of Notes Receivable	$ 833,000