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NOTE C - EARNINGS PER SHARE (Details) - shares		3 Months Ended		6 Months Ended
		Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
NOTE C - EARNINGS PER SHARE (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	[1]
Weighted Average Number Diluted Shares Outstanding Adjustment		117,209	190,418	129,245	184,793
Stock Appreciation Rights (SARs) [Member]
NOTE C - EARNINGS PER SHARE (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				1,353,750	1,265,375
[1] For the six and three month periods ended October 31, 2017, dilutive securities are excluded since the inclusion of such shares would be antidilutive due to the net loss for the periods. The exercisable shares excluded are 1,353,750. The effect of dilutive securities for the periods would have been 129,245 and 117,209, respectively. For the six and three month periods ended October 31, 2016, dilutive securities are excluded since the inclusion of such shares would be antidilutive due to the net loss for the periods. The exercisable shares excluded are 1,265,375. The effect of dilutive securities for the periods would have been 184,793 and 190,418, respectively.

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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