Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Apr. 30, 2018		Apr. 30, 2017		Apr. 30, 2016
Revenues:
License		$ 15,344		$ 15,584		$ 22,043
Services and other		53,518		48,313		51,099
Maintenance		43,841		42,389		40,747
Total revenues		112,703		106,286		113,889
Cost of revenues:
License		7,077		7,563		7,688
Services and other		33,597		33,814		37,100
Maintenance		9,326		9,707		9,441
Total cost of revenues		50,000		51,084		54,229
Gross margin		62,703		55,202		59,660
Research and development		11,877		11,889		11,248
Sales and marketing		20,658		20,287		22,164
General and administrative		16,057		14,219		12,449
Amortization of acquisition-related intangibles		580		1,041		272
Total operating expenses		49,172		47,436		46,133
Operating income		13,531		7,766		13,527
Other income:
Interest income		1,575		1,257		1,346
Other, net		609		12,592		(173)
Earnings before income taxes		15,715		21,615		14,700
Income tax expense		3,662		6,994		4,458
Net earnings		$ 12,053		$ 14,621		$ 10,242
Earnings per common share:
Basic	[1]	$ 0.40		$ 0.50		$ 0.36
Diluted	[1]	$ 0.40	[2]	$ 0.49	[2]	$ 0.35
Shares used in the calculation of earnings per common share:
Basic		30,080		29,232		28,727
Diluted		30,472		29,567		29,005

[1] Diluted per share amounts for Class A shares are shown above. Diluted per share for Class B shares under the two-class method are $0.39, $0.49 and $0.35 for the years ended April 30, 2018, 2017 and 2016, respectively. See Note 1 to the Consolidated Financial Statements.

[2] Table may contain rounding