Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Revenues:
License		$ 3,959	$ 5,048	$ 11,726	$ 15,487
Services and other		11,815	11,801	36,385	39,109
Maintenance		10,667	10,246	31,909	30,427
Total revenues		26,441	27,095	80,020	85,023
Cost of revenues:
License		2,081	1,846	5,510	5,775
Services and other		8,061	9,181	26,159	28,555
Maintenance		2,250	2,461	7,489	6,872
Total cost of revenues		12,392	13,488	39,158	41,202
Gross margin		14,049	13,607	40,862	43,821
Research and development		3,074	3,012	9,343	8,177
Sales and marketing		4,635	5,269	15,307	15,967
General and administrative		3,500	2,740	10,701	9,807
Amortization of acquisition-related intangibles		385	68	702	204
Total operating expenses		11,594	11,089	36,053	34,155
Operating income		2,455	2,518	4,809	9,666
Other income (expense):
Interest income		287	352	882	1,009
Other, net		738	(546)	637	(767)
Earnings before income taxes		3,480	2,324	6,328	9,908
Income tax expense		1,237	213	1,985	3,072
Net earnings		$ 2,243	$ 2,111	$ 4,343	$ 6,836
Earnings per common share:
Basic	[1]	$ 0.08	$ 0.07	$ 0.15	$ 0.24
Diluted	[1]	0.08	0.07	0.15	0.24
Cash dividends declared per common share		$ 0.11	$ 0.10	$ 0.32	$ 0.30
Shares used in the calculation of earnings per common share:
Basic		29,333	28,778	29,136	28,684
Diluted		29,630	29,107	29,447	28,973

[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 $0.08 and $0.07 for the three months ended January 31, 2017 and 2016, and $0.15 and $0.24 for the nine months ended January 31, 2017 and 2016, respectively. See Note D to the Condensed Consolidated Financial Statements.