Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Oct. 31, 2014	Apr. 30, 2014
Allowance for doubtful accounts receivable	$ 315	$ 222
Property and equipment, accumulated depreciation	31,123	30,545
Capitalized software, accumulated amortization	10,382	8,589
Other intangibles, accumulated amortization	$ 3,347	$ 2,881
Class A treasury stock, shares	4,532,580	4,444,815
Class A Common Shares
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	30,193,119	30,075,187
Class B Common Shares
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	2,587,086	2,587,086
Common stock, shares outstanding	2,587,086	2,587,086