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Note 5 - Concentrations - Concentration Risk (Details)	12 Months Ended
Note 5 - Concentrations - Concentration Risk (Details)	Dec. 31, 2021	Dec. 31, 2020
Supplier Concentration Risk [Member] \| Vendor A [Member] \| Inventory Purchases [Member]
Concentration risk	31.00%	25.00%
Supplier Concentration Risk [Member] \| Vendor B [Member] \| Inventory Purchases [Member]
Concentration risk	0.00%	27.00%
Supplier Concentration Risk [Member] \| Vendor C [Member] \| Inventory Purchases [Member]
Concentration risk	0.00%	26.00%
Supplier Concentration Risk [Member] \| Vendor D [Member] \| Inventory Purchases [Member]
Concentration risk	0.00%	12.00%
Supplier Concentration Risk [Member] \| Vendor E [Member] \| Inventory Purchases [Member]
Concentration risk	42.00%	0.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer A [Member]
Concentration risk	0.00%	17.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer B [Member]
Concentration risk	0.00%	10.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer C [Member]
Concentration risk	27.00%	0.00%