Note 1 - Description of the Business and Basis of Presentation (Details Textual)		3 Months Ended			6 Months Ended
	Jun. 16, 2021	Jun. 30, 2022 USD ($) $ / shares	Mar. 31, 2022 USD ($) $ / shares	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) $ / shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.001	$ 0.001		$ 0.001		$ 0.001
Operating Income (Loss), Total		$ (562,000)		$ (168,000)	$ (195,000)	$ (397,000)
Net Income (Loss) Attributable to Parent, Total		(636,000)		19,764,000	70,000	(373,000)
Net Cash Provided by (Used in) Operating Activities, Total					(1,276,000)	(325,000)
Stockholders' Equity Attributable to Parent, Ending Balance		3,257,000	$ 3,855,000	$ (2,075,000)	3,257,000	$ (2,075,000)	$ 3,131,000	$ (22,684,000)	$ (5,996,000)
Assets, Current, Total		8,786,000	8,000,000.0		8,786,000		7,994,000
Liabilities, Current, Total		$ 6,014,000	4,800,000		$ 6,014,000		$ 5,534,000
Premarket Tobacco Application Registration [Member]
Cost of Revenue, Total			$ 4,400,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	100