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Note 3 - Revenue From Contracts With Customers - Contract Assets and Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Contract assets $ 15,013 $ 9,140
Contract assets, additions 9,087 6,054
Contract assets, deduction 5,965 7,187
Contract assets 18,135 8,007
Contract liabilities 471 2,298
Contract liabilities, additions 2,955 1,873
Contract liabilities, deductions 3,174 2,753
Contract liabilities 252 1,418
Amounts included in the contract liability balance at the beginning of the period $ 471 $ 2,298