Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended
		Jul. 31, 2021	Jul. 31, 2020
Revenues:
Revenues		$ 29,271	$ 27,278
Cost of revenues:
Cost of revenues		12,367	13,037
Gross margin		16,904	14,241
Research and development		4,424	4,095
Sales and marketing		6,120	4,744
General and administrative		4,534	4,464
Amortization of acquisition-related intangibles		53	53
Total operating expenses		15,131	13,356
Operating income		1,773	885
Other income:
Interest income		93	126
Other, net		344	1,206
Earnings before income taxes		2,210	2,217
Income tax (benefit)\expense		(737)	183
Net earnings		$ 2,947	$ 2,034
Earnings per common share
Basic (in usd per share)	[1]	$ 0.09	$ 0.06
Cash dividends declared per common share (in usd per share)	[1]	$ 0.11	$ 0.11
Shares used in the calculation of earnings per common share
Basic (in shares)		33,053,000	32,339,000
Diluted (in shares)		33,946,000	32,932,000
Class A Common Shares
Earnings per common share
Basic (in usd per share)		$ 0.09	$ 0.06
Diluted (in usd per share)	[1]	$ 0.09	$ 0.06
Shares used in the calculation of earnings per common share
Basic (in shares)		31,231,000	30,517,000
Diluted (in shares)		33,946,000	32,932,000
Class B Common Shares
Earnings per common share
Basic (in usd per share)		$ 0.09	$ 0.06
Diluted (in usd per share)		$ 0.09	$ 0.06
Shares used in the calculation of earnings per common share
Basic (in shares)		1,822,000	1,822,000
Diluted (in shares)		1,822,000	1,822,000
Subscription Fees
Revenues:
Revenues		$ 9,788	$ 6,363
Cost of revenues:
Cost of revenues		3,224	2,759
License
Revenues:
Revenues		492	787
Cost of revenues:
Cost of revenues		159	675
Professional Services and Other
Revenues:
Revenues		9,529	9,814
Cost of revenues:
Cost of revenues		7,010	7,830
Maintenance
Revenues:
Revenues		9,462	10,314
Cost of revenues:
Cost of revenues		$ 1,974	$ 1,773

[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 $0.09 and $0.06 for the three months ended July 31, 2021 and 2020. See Note D to the Condensed Consolidated Financial Statements.