Note J - Commitments and Contingencies	6 Months Ended
Oct. 31, 2017
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	J – Commitments and Contingencies The Company has a standby letter of credit relating to an insurance policy totaling $1 million at October 31, 2017.

The entire disclosure for commitments and contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-URI http://asc.fasb.org/topic&trid=2127136

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-URI http://asc.fasb.org/topic&trid=2144648

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