Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($)	Mar. 29, 2024 USD ($)
Cash and Cash Equivalents, at Carrying Value	$ 2,827,000		$ 3,867,000
Working Capital (Deficit)	6,300,000		7,200,000
Net Cash Provided by (Used in) Operating Activities	(958,000)	$ (1,328,000)
Net Income (Loss) Attributable to Parent	(1,152,000)	(1,363,000)
Retained Earnings (Accumulated Deficit)	(84,206,000)	(79,600,000)	(83,054,000)
Net Cash Provided by (Used in) Financing Activities	(75,000)	(204,000)
Proceeds from Stock Options Exercised	0	0
Revenues	4,999,000	3,870,000
Slotting Fees and Promotional Allowances	$ 442,000	$ 305,000
Maximum Discount for Customers, Payment Made Within 15 Days	2.00%
Accounts Receivable, Allowance for Credit Loss, Current	$ 252,000		$ 260,000
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares	13,566,522	6,767,280
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares	6,022,102	27,721,945
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Major Customers	1		0
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]
Concentration Risk, Percentage	26.00%
Shipping and Handling [Member]
Revenues	$ 35,000	$ 41,000
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 2,000,000