LEASES (Details) - USD ($)	12 Months Ended
	Apr. 30, 2020	May 01, 2019
Leases
Lease, Practical Expedients, Package [true false]	true
Lessee, Operating Lease, Existence of Option to Extend [true false]	true
Operating lease right-of-use assets	$ 2,008,000
Finance lease, Right-of-Use	27,000
Operating Lease, Liability, Current	395,000
Finance Lease, Liability, Current	27,000
Operating Lease, Liability, Noncurrent	1,879,000
Deferred rent reclassified from accrued liabilities to operating lease right-of-use assets	206,000
Restatement Adjustment
Leases
Deferred rent reclassified from accrued liabilities to operating lease right-of-use assets		$ 206,000
ASU 2016-02
Leases
Operating lease right-of-use assets	2,008,000	2,267,000
Finance lease, Right-of-Use		98,000
Operating Lease, Liability, Current		380,000
Finance Lease, Liability, Current		73,000
Operating Lease, Liability, Noncurrent		2,093,000
Finance Lease, Liability, Noncurrent		$ 25,000
Operating lease liability	$ 2,274,000
Minimum
Leases
Initial lease agreement term	1 year
Maximum
Leases
Remaining lease term	7 years
Land and Building | Minimum
Leases
Initial lease agreement term	5 years
Land and Building | Maximum
Leases
Option to extend term	P10Y
Remaining lease term	15 years