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Note 4 - Revenue Recognition 2 (Details Textual)
Dec. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Amount $ 9,962
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Revenue, Remaining Performance Obligation, Amount $ 9,666
Revenue, Remaining Performance Obligation, Percentage 97.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month) 12 months