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Note 2 - Revenue Recognition - Contract Liabilities (Details)
$ in Thousands
3 Months Ended
Jun. 30, 2021
USD ($)
Contract liabilities as of March 31, 2021 $ 8,994
Prior year liabilities recognized in revenues during the quarter ended June 30, 2021 (2,448)
Contract liabilities added during the quarter ended June 30, 2021, net of revenues recognized 3,144
Contract liabilities balance as of June 30, 2021 $ 9,690