Note 14 - Leases - Adoption of ASC 842 (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Apr. 01, 2019	Mar. 31, 2019
Right of use asset	$ 3,359	$ 3,795
Operating lease liabilities – ST	439	309
Operating lease liabilities – LT	3,000	3,512
Total operating lease liabilities	$ 3,439	$ 3,821
Weighted-average remaining lease term (Year)	6 years 332 days	7 years 251 days
Weighted-average discount rate	7.08%	7.06%
Accounting Standards Update 2016-02 [Member]
Right of use asset		$ 3,800	3,795
Operating lease liabilities – ST			309
Operating lease liabilities – LT			3,512
Total operating lease liabilities		$ 3,800	3,821
Previous Accounting Guidance [Member]
Right of use asset
Operating lease liabilities – ST
Operating lease liabilities – LT
Total operating lease liabilities