9. BENEFIT PLAN (Details Narrative) - USD ($)	12 Months Ended
Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Compensation and Retirement Disclosure [Abstract]
Matching contributions	$ 543,000	$ 454,000	$ 300,000

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration