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Note 2 - Summary of Significant Accounting Policies 1 (Details Textual)
$ in Millions
9 Months Ended
Sep. 30, 2021
USD ($)
Revenue, Remaining Performance Obligation, Amount $ 177.2
Contract with Customer, Asset, after Allowance for Credit Loss, Total 2.6
Contract with Customer, Liability, Revenue Recognized $ 0.1