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Note 3 - Revenue - Contract Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Outstanding $ 7,659 $ 6,431
Transferred to receivables from contract assets recognized (6,795) (5,180)
Product transferred over time 5,035 6,408
Outstanding 5,899 7,659
Outstanding $ 5,899 $ 7,659