Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Letters of Credit Outstanding, Amount	$ 200
Restricted Cash and Cash Equivalents, Current	715	$ 1,454
Accounts Receivable, Allowance for Credit Loss	$ 358	$ 334
Preferred Stock, Dividend Rate, Percentage	12.00%
Preferred Stock, Liquidation Preference Per Share	$ 1
Preferred Stock, Dividends Per Share, Declared (in dollars per share)	$ 0	$ 0
Percentage of Revenue Transferred to Customers	79.00%	72.00%
Advertising Expense	$ 84	$ 63
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	163,744	205,907
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease)	$ 162	$ (426)
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease)	(162)	426
Gain (Loss), Foreign Currency Transaction, before Tax	54	42
Accounts Receivable, Allowance for Credit Loss, Current	358	328
Retained Earnings (Accumulated Deficit)	18,670	$ 11,826
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts Receivable, Allowance for Credit Loss, Current	30
Retained Earnings (Accumulated Deficit)	$ 30
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Geographic Distribution, Domestic [Member]
Concentration Risk, Percentage	4.10%	4.00%