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Note 5 - Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Prepaid inventory $ 211 $ 368
Prepaid insurance 146 138
Prepaid dues and subscriptions 43 18
Prepaid marketing costs 24 15
Prepaid patents 12 9
Tenant Allowance 11 0
Prepaid consultants 0 68
Prepaid sales rebates 0 19
Prepaid rent 0 14
Other 113 129
Total prepaid expenses and other current assets $ 560 $ 778