Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Revenue:
Total revenues		$ 123,659	$ 127,553	$ 111,408
Cost of revenue:
Cost of revenues		49,368	51,758	50,428
Gross margin		74,291	75,795	60,980
Research and development		17,767	17,600	16,964
Sales and marketing		22,184	22,867	20,304
General and administrative		23,684	21,960	19,139
Amortization of acquisition-related intangibles		106	212	212
Total operating expenses		63,741	62,639	56,619
Operating income		10,550	13,156	4,361
Other income:
Interest income		2,149	391	409
Other, net		187	290	4,078
Earnings before income taxes		12,886	13,837	8,848
Income tax expense		2,465	1,055	759
Net earnings		$ 10,421	$ 12,782	$ 8,089
Earnings per common share
Basic (in usd per share)	[1]	$ 0.31	$ 0.38	$ 0.25
Diluted EPS (in usd per share)		$ 0.31	$ 0.37	$ 0.24
Shares used in the calculation of earnings per common share:
Basic (in shares)		33,761	33,365	32,559
Diluted (in shares)		33,992	34,305	33,169
Subscriptions fees
Revenue:
Total revenues		$ 50,412	$ 42,066	$ 28,877
Cost of revenue:
Cost of revenues		15,831	13,383	11,884
License
Revenue:
Total revenues		2,752	5,390	2,993
Cost of revenue:
Cost of revenues		705	1,104	1,921
Professional services and other
Revenue:
Total revenues		35,938	43,476	39,616
Cost of revenue:
Cost of revenues		26,423	30,306	29,093
Maintenance
Revenue:
Total revenues		34,557	36,621	39,922
Cost of revenue:
Cost of revenues		$ 6,409	$ 6,965	$ 7,530
Class A Common Shares
Earnings per common share
Basic (in usd per share)		$ 0.31	$ 0.38	$ 0.25
Diluted EPS (in usd per share)	[1]	$ 0.31	$ 0.37	$ 0.24
Shares used in the calculation of earnings per common share:
Basic (in shares)		31,939	31,543	30,737
Diluted (in shares)		33,992	34,305	33,169
Class B Common Shares
Earnings per common share
Basic (in usd per share)		$ 0.31	$ 0.38	$ 0.25
Diluted EPS (in usd per share)		$ 0.31	$ 0.38	$ 0.25
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 $0.31, $0.38 and $0.25 for the years ended April 30, 2023, 2022 and 2021, respectively. See Note 1(s) to the Consolidated Financial Statements.