Note 1 - Basis of Presentation (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Deconsolidation, Gain (Loss), Amount	$ 219,000	$ 218,527		$ 218,534
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		471,000	471,000	471,000	471,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		25,000	25,000	25,000	25,000