Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Revenue:
Total revenues		$ 127,553	$ 111,408	$ 115,466
Cost of revenue:
Cost of revenues		51,758	50,428	52,308
Gross margin		75,795	60,980	63,158
Research and development		17,600	16,964	15,348
Sales and marketing		22,867	20,304	21,958
General and administrative		21,960	19,139	19,519
Amortization of acquisition-related intangibles		212	212	285
Total operating expenses		62,639	56,619	57,110
Operating income		13,156	4,361	6,048
Other income (expense):
Interest income		391	409	1,524
Other, net		290	4,078	(774)
Earnings before income taxes		13,837	8,848	6,798
Income tax expense		1,055	759	56
Net earnings		$ 12,782	$ 8,089	$ 6,742
Earnings per common share
Basic (in usd per share)	[1]	$ 0.38	$ 0.25	$ 0.21
Diluted (in usd per share)		$ 0.37	$ 0.24	$ 0.21
Shares used in the calculation of earnings per common share:
Basic (in shares)		33,365	32,559	31,747
Diluted (in shares)		34,305	33,169	32,367
Subscriptions fees
Revenue:
Total revenues		$ 42,066	$ 28,877	$ 22,033
Cost of revenue:
Cost of revenues		13,383	11,884	9,491
License
Revenue:
Total revenues		5,390	2,993	7,582
Cost of revenue:
Cost of revenues		1,104	1,921	4,798
Professional services and other
Revenue:
Total revenues		43,476	39,616	42,774
Cost of revenue:
Cost of revenues		30,306	29,093	30,695
Maintenance
Revenue:
Total revenues		36,621	39,922	43,077
Cost of revenue:
Cost of revenues		$ 6,965	$ 7,530	$ 7,324
Class A Common Shares
Earnings per common share
Basic (in usd per share)		$ 0.38	$ 0.25	$ 0.21
Diluted (in usd per share)	[1]	$ 0.37	$ 0.24	$ 0.21
Shares used in the calculation of earnings per common share:
Basic (in shares)		31,543	30,737	29,925
Diluted (in shares)		34,305	33,169	32,367
Class B Common Shares
Earnings per common share
Basic (in usd per share)		$ 0.38	$ 0.25	$ 0.21
Diluted (in usd per share)		$ 0.38	$ 0.25	$ 0.22
Shares used in the calculation of earnings per common share:
Basic (in shares)		1,822	1,822	1,822
Diluted (in shares)		1,822	1,822	1,822

[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 $0.38, $0.25 and $0.22 for the years ended April 30, 2022, 2021 and 2020, respectively. See Note 1 to the Consolidated Financial Statements.