Note H - Weighted Average Shares Outstanding (Details) - Weighted average shares of common stock outstanding	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Weighted average shares of common stock outstanding [Abstract]
Weighted average shares outstanding-basic	9,016,820	9,105,921	9,018,524	9,205,332
Dilutive options and restricted stock	467,834	473,488	470,229	460,407
Weighted average shares outstanding-diluted	9,484,654	9,579,409	9,488,753	9,665,739
Antidilutive securities not included:
Options	80,000	45,000	70,000	40,000