Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2017	Apr. 30, 2017
Allowance for doubtful accounts receivable	$ 186	$ 171
Property and equipment, accumulated depreciation	28,273	28,153
Capitalized software, accumulated amortization	21,293	20,423
Other intangibles, accumulated amortization	$ 6,801	$ 6,406
Class A treasury stock, shares	4,588,632	4,588,632
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	31,987,258	31,821,508
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	2,329,098	2,393,336
Common stock, shares outstanding	2,329,098	2,393,336