Note 2 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Number of Subsidiaries	2
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 109,000	$ 355,000
Inventory Valuation Reserves, Ending Balance	$ 156,000	$ 179,000
Number of Operating Segments	1
Charlie's Chalk Dust, LLC and Bazi, Inc [Member]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%