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Note 8 - Related Party Transactions (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Agreement Between the BIRD Foundation, the Company, and MARPE Technologies, LTD [Member]        
Agreement, Conditional Grant $ 1,000   $ 1,000  
Agreement, Exclusive Manufacturing Rights, Term (Year)     10 years  
Abilitech Medical, Inc [Member] | Loss on Long-Term Purchase Commitment [Member]        
Accounts Receivable, after Allowance for Credit Loss 226   $ 226  
Abilitech Medical, Inc [Member] | Payments Received for Delivery of EMS Products [Member]        
Related Party Transaction, Amounts of Transaction $ 163 $ 0 $ 217 $ 0
David Kunin [Member] | Marpe Technologies, LTD [Member] | Maximum [Member]        
Ownership, Percent 10.00%   10.00%  
Marpe Technologies, LTD [Member] | Agreement Between the BIRD Foundation, the Company, and MARPE Technologies, LTD [Member]        
Agreement, Conditional Grant Matching Amount $ 500   $ 500  
Revenue from Related Parties     $ 163 $ 113