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Note 2 - Acquisitions (Details Textual) - USD ($)
$ in Millions
9 Months Ended
Mar. 01, 2021
Sep. 30, 2022
Sep. 30, 2021
Payments to Acquire Businesses, Gross   $ 1 $ 18
Pi Innovo Holdings Limited [Member]      
Business Acquisition, Percentage of Voting Interests Acquired 51.00%    
Business Combination, Step Acquisition, Equity Interest in Acquiree, including Subsequent Acquisition, Percentage, Total 100.00%    
Business Combination, Consideration Transferred, Total $ 35    
Payments to Acquire Businesses, Gross 18    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value $ 17