Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Jan. 31, 2014		Jan. 31, 2013		Jan. 31, 2014		Jan. 31, 2013
Revenues:
License	$ 5,002		$ 4,926		$ 14,412		$ 15,512
Services and other	10,167		9,564		33,057		34,371
Maintenance	9,258		8,586		27,207		25,370
Total revenues	24,427		23,076		74,676		75,253
Cost of revenues:
License	727		1,797		3,122		4,609
Services and other	7,695		7,354		23,916		24,119
Maintenance	2,042		1,893		5,994		5,803
Total cost of revenues	10,464		11,044		33,032		34,531
Gross margin	13,963		12,032		41,644		40,722
Research and development	2,338		2,209		6,442		6,618
Sales and marketing	5,032		4,868		14,444		14,626
General and administrative	2,882		2,590		9,106		8,639
Amortization of acquisition-related intangibles	125		125		375		375
Provision/(recovery) for doubtful accounts	47		(51)		(37)		216
Total operating expenses	10,424		9,741		30,330		30,474
Operating income	3,539		2,291		11,314		10,248
Other income (expense):
Interest income	231		293		697		877
Other, net	(33)		164		(38)		162
Earnings before income taxes	3,737		2,748		11,973		11,287
Income tax expense	1,260		608		4,210		3,954
Net earnings	$ 2,477		$ 2,140		$ 7,763		$ 7,333
Earnings per common share:
Basic	$ 0.09	[1]	$ 0.08	[1]	$ 0.28	[1]	$ 0.27	[1]
Diluted	$ 0.09	[1]	$ 0.08	[1]	$ 0.28	[1]	$ 0.27	[1]
Cash dividends declared per common share	$ 0.10		$ 0.10		$ 0.20		$ 0.28
Shares used in the calculation of earnings per common share:
Basic	27,686		27,193		27,499		27,139
Diluted	28,187		27,614		27,972		27,601

[1] Basic per share amounts are the same for Class A and Class B shares. Diluted per share amounts for Class A shares are shown above. Diluted earnings per share for Class B shares under the two-class method are $0.09 and $0.08 for the three months ended January 31, 2014 and 2013 and $0.28 and $0.27 for the nine months ended January 31, 2014 and 2013, respectively. See Note D to the Condensed Consolidated Financial Statements.