Note 18 - Income Taxes - Provision for Income Taxes (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Current:
Federal	$ (133,000)	$ 1,124,000
State	183,000	128,000
Foreign	156,000	132,000
Total current	206,000	1,384,000
Deferred:
Federal	(14,000)	(592,000)
State	3,000	(67,000)
Total deferred	(10,566)	(659,000)
Total	$ 195,000	$ 725,000