5. Benefit Plans (Details - Share based compensation) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Share based compensation	$ 1,595	$ 1,538	$ 3,363
Cost of revenues [Member]
Share based compensation	474	378	108
Selling, general and administrative
Share based compensation	1,121	820	1,553
Discontinued operations
Share based compensation	$ 0	$ 340	$ 1,702