Note 9 - Other Commitments and Contingencies (Details Textual) - USD ($)	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Purchase Obligation, Total	$ 825,000	$ 951,000	$ 449,000

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

No definition available.