Note 14 - Leases (Details Textual) - USD ($) $ in Thousands	Apr. 01, 2019	Sep. 30, 2019	Mar. 31, 2019
Operating Lease, Right-of-Use Asset	$ 3,795	$ 3,607	$ 0
Operating Lease, Liability, Total	3,821	$ 3,664
Maximum [Member]
Lessee, Operating Lease, Renewal Term		5 years
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset	3,800		3,795
Operating Lease, Liability, Total	3,800		$ 3,821
Operating Lease, Impairment Loss	$ 0