Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2017	Apr. 30, 2016
Allowance for doubtful accounts receivable	$ 151	$ 178
Property and equipment, accumulated depreciation	33,029	32,437
Capitalized software, accumulated amortization	19,460	16,173
Other intangibles, accumulated amortization	$ 5,913	$ 4,747
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	31,621,025	30,972,947
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	2,432,086	2,487,086
Common stock, shares outstanding	2,432,086	2,487,086