5. Equity Compensation Plans (Details - Share based compensation) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Share based compensation	$ 651	$ 325	$ 1,254	$ 622
Cost of revenues [Member]
Share based compensation	245	85	431	170
Selling, general and administrative
Share based compensation	$ 406	$ 240	$ 823	$ 452