Note 9 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jul. 31, 2017	Apr. 30, 2017
Building and leasehold improvements	$ 1,013	$ 789
Furniture and equipment	3,872	3,865
	4,885	4,654
Accumulated depreciation and amortization	(3,478)	(3,415)
Total property and equipment, net	$ 1,407	$ 1,239