Note 9 - Income Taxes - Reconciliation of Computed Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Computed income taxes at 21% for 2019 and 2018, respectively	$ (1,118)	$ (1,047)
State and local income taxes, net of federal impact	(154)	(142)
Change in valuation allowance	1,298	1,373
Stock-based compensation	14	(204)
Other	(8)	52
Total Income Tax Benefit	$ 32	$ 32