Note H - Weighted Average Shares Outstanding (Detail) - Weighted average shares of common stock outstanding	3 Months Ended		6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Weighted average shares outstanding-basic	9,105,921	9,776,817	9,205,332	10,024,088
Dilutive options and restricted stock	473,488	304,457	460,407	306,461
Weighted average shares outstanding-diluted	9,579,409	10,081,274	9,665,739	10,330,549
Antidilutive securities not included:
Options	45,000	25,000	40,000	25,000