Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Jul. 31, 2020	Apr. 30, 2020
Allowance for doubtful accounts receivable	$ 259,000	$ 264,000
Property and equipment, accumulated depreciation	30,110,000	29,959,000
Capitalized software, accumulated amortization	35,829,000	34,611,000
Other intangibles, accumulated amortization	$ 12,556,000	$ 12,243,000
Class A Common Shares
Common stock, par value (in usd per share)	$ 0.10	$ 0.10
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	35,231,396	35,000,649
Common stock, shares outstanding	30,642,764	30,412,017
Class A treasury stock (in shares)	4,588,632	4,588,632
Class B Common Shares
Common stock, par value (in usd per share)	$ 0.10	$ 0.10
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	1,821,587	1,821,587
Common stock, shares outstanding	1,821,587	1,821,587