Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Revenues:
License		$ 15,584	$ 22,043	$ 16,748
Services and other		48,313	51,099	47,215
Maintenance		42,389	40,747	38,910
Total revenues		106,286	113,889	102,873
Cost of revenues:
License		7,563	7,688	7,675
Services and other		33,814	37,100	34,204
Maintenance		9,707	9,441	8,580
Total cost of revenues		51,084	54,229	50,459
Gross margin		55,202	59,660	52,414
Research and development		11,889	11,248	11,088
Sales and marketing		20,287	22,164	18,667
General and administrative		14,219	12,449	12,923
Amortization of acquisition-related intangibles		1,041	272	394
Total operating expenses		47,436	46,133	43,072
Operating income		7,766	13,527	9,342
Other income:
Interest income		1,257	1,346	1,229
Other, net		12,592	(173)	(169)
Earnings before income taxes		21,615	14,700	10,402
Income tax expense		6,994	4,458	2,274
Net earnings		$ 14,621	$ 10,242	$ 8,128
Earnings per common share:
Basic	[1]	$ 0.50	$ 0.36	$ 0.29
Diluted	[1]	$ 0.49	$ 0.35	$ 0.28
Shares used in the calculation of earnings per common share:
Basic		29,232	28,727	28,283
Diluted		29,567	29,005	28,614

[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 per share for Class B shares under the two-class method are $0.49, $0.35 and $0.29 for the years ended April 30, 2017, 2016 and 2015, respectively. See Note 1 to the Consolidated Financial Statements.