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Note 11 - Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Net sales $ 68,923 $ 62,643
Transferred over Time [Member]    
Net sales 60,878 62,643
Transferred at Point in Time [Member]    
Net sales $ 8,045