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Note 14 - Significant Customers / Concentration (Details) - Customer Concentration Risk [Member]
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Revenue Benchmark [Member] | Customer A [Member]    
Concentration Risk, Percentage 12.00%  
Revenue Benchmark [Member] | Customer B [Member]    
Concentration Risk, Percentage 10.00% 10.00%
Revenue Benchmark [Member] | Customer C [Member]    
Concentration Risk, Percentage 0.00% 27.00%
Accounts Receivable [Member] | Customer A [Member]    
Concentration Risk, Percentage 16.00% 0.00%
Accounts Receivable [Member] | Customer B [Member]    
Concentration Risk, Percentage 0.00% 12.00%
Accounts Receivable [Member] | Customer D [Member]    
Concentration Risk, Percentage 11.00% 0.00%
Accounts Receivable [Member] | Customer E [Member]    
Concentration Risk, Percentage 0.00% 39.00%
Accounts Receivable [Member] | Customer F [Member]    
Concentration Risk, Percentage 0.00% 16.00%