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Note 15 - Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net sales $ 285,907 $ 279,317 $ 172,149
Transferred over Time [Member]      
Net sales 241,690 279,317 172,149
Transferred at Point in Time [Member]      
Net sales $ 44,217 $ 0 $ 0