Note 6 - Income Taxes - Reconciliation of Computed Income Tax (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Computed income taxes at 21% for 2021 and 2020, respectively	$ (1,634,000)	$ (502,000)
State and local income taxes, net of federal impact	(272,000)	(72,000)
Change in valuation allowance	2,892,000	571,000
True-up adjustment	(238,000)	0
Stock-based compensation	0	1,000
Other	6,000	14,000
Income tax expense	273,000	12,000
Paycheck Protection Program CARES Act [Member]
Paycheck Protection Plan loan forgiveness	$ (481,000)	$ 0