Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Cash flows from operating activities:
Net earnings	$ 3,314	$ 4,214	$ 6,261
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,039	1,601	2,170
Stock-based compensation expense	1,000	2,649	1,817
Net gain on investments		331	(1,193)
Deferred income taxes		(1,999)	(99)
Changes in operating assets and liabilities:
Purchases of trading securities		(7,094)	(174)
Proceeds from maturities and sales of trading securities		784	210
Accounts receivable, net		(3,209)	4,502
Prepaid expenses and other assets		(173)	(2,013)
Accounts payable and other liabilities		(2,420)	(2,595)
Deferred revenue		(5,945)	(1,174)
Net cash (used in) provided by operating activities		(11,261)	7,712
Cash flows from investing activities:
Purchases of property and equipment, net of disposals		(2,706)	(615)
Purchases of business		(6,500)	0
Net cash (used in) investing activities		(9,206)	(615)
Cash flows from financing activities:
Proceeds from exercise of stock options		1,145	5,714
Dividends paid		(7,406)	(7,268)
Net cash (used in) financing activities		(6,261)	(1,554)
Net change in cash and cash equivalents		(26,728)	5,543
Cash and cash equivalents at beginning of period		110,690	88,658
Cash and cash equivalents at end of period	94,201	83,962	94,201
Supplemental disclosure of cash flow information:
Income taxes, net of refunds		$ 2,997	176
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 3,676		$ 3,676