Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.0001	$ 0.0001
Number of Wholly-owned Subsidiaries	1
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares	6,413,546	5,596,853
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 205	$ 134
Inventory Valuation Reserves	0	0
Advertising Expense	426	145
Marketing Expense	688	924
Cost of Revenue, Total	4,315	5,734
Revenue from Contract with Customer, Including Assessed Tax	7,481	7,381
Product Line Exit Expense	0	747
Write-off, Inventory Cost		641
Retiring Cost		106
Standard Product Warranty Accrual, Ending Balance	125	96
Shipping and Handling [Member]
Cost of Revenue, Total	296	167
Revenue from Contract with Customer, Including Assessed Tax	$ 109	$ 88