Note 11 - Share Capital (Details Textual) - USD ($) $ in Thousands		4 Months Ended	12 Months Ended
	Jun. 18, 2019	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			394,078	694,322
Stock Issued During Period, Shares, Restricted Stock Award, Gross			65,405	83,378
Common Stock, Shares Authorized		39,824,703	39,824,703	38,978,604
Common Stock, Shares, Issued, Total		26,419,961	26,419,961	26,439,334
Stock Repurchased During Period, Shares		478,856
Stock Repurchased During Period, Value		$ 7,000	$ 6,992
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 100,000
Stock Repurchase Program, Period in Force	5 years
Common Stock, Shares, Outstanding, Ending Balance		26,419,961	26,419,961	26,439,334