Note 2 - Subordinated Notes Receivable - Reconciliation of the Activity (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest paid-in-kind					$ (25,000)
Impairment loss					(527,000)	$ (897,000)
Second A&R Note [Member]
Principal			$ 2,564,000		2,564,000
Discount, balance			(1,855,000)		(1,855,000)
Balance			709,000		709,000
Interest paid-in-kind, principal			25,000
Interest paid-in-kind			25,000
Gain on settlement of debt, principal			(529,000)
Gain on settlement of debt, discount			1,855,000
Gain on settlement of debt			1,326,000
Principal payments, principal			(2,060,000)
Principal payments			(2,060,000)
Principal
Discount, balance
Balance				$ 1,300,000
Impairment loss				$ (897,000)
S&L Subordinated Notes Receivable [Member]
Principal	3,327,000	3,327,000	3,329,000		3,329,000
Discount, balance	(583,000)	(622,000)	(659,000)		(659,000)
Balance	2,744,000	2,705,000	2,670,000		2,670,000
Principal payments, principal			(2,000)
Principal payments			(2,000)
Principal	3,327,000	3,327,000	3,327,000		3,327,000
Discount, balance	(1,082,000)	(583,000)	(622,000)		(1,082,000)
Balance	2,245,000	2,744,000	2,705,000		$ 2,245,000
Accretion of discount	28,000	39,000	37,000
Accretion of discount	28,000	39,000	37,000
Accretion of discount	28,000	$ 39,000	$ 37,000
Impairment loss	$ (527,000)