Note 2 - Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2019
Operating lease cost	$ 1,384	$ 3,969
Short-term lease cost	75	784
Variable lease cost	444	1,333
Total lease cost	$ 1,903	$ 6,086