Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Cash flows from operating activities:
Net earnings	$ 11,373	$ 10,312	$ 12,805
Earnings from discontinued operations, net of tax	(1,679)	(327)	(1,131)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	4,439	3,161	4,138
Stock-based compensation expense	6,320	5,152	3,935
Net gain on investments	(2,286)	(133)	(394)
Net gain on sale of fixed assets	0	0	(36)
Gain on the sale of business	(1,438)	0	0
Deferred income tax benefit	(5,893)	(4,092)	(854)
Gain on the sale of discontinued operations	(2,124)	0	0
Changes in operating assets and liabilities, net of effects of acquisition:
Purchases of trading securities	(26,008)	(8,599)	(1,713)
Proceeds from sales and maturities of trading securities	27,969	1,620	1,287
Accounts receivable, net	(728)	(4,401)	3,031
Prepaid expenses and other assets	1,669	(2,088)	450
Accounts payable and other liabilities	(1,651)	(2,515)	1,540
Deferred revenue	5,169	1,171	4,811
Net cash provided by (used in) operating activities of continuing operations	15,132	(739)	27,869
Cash provided by operating activities of discontinued operations	1,679	359	1,151
Net cash provided by (used in) operating activities	16,811	(380)	29,020
Cash flows from investing activities:
Purchases of property and equipment, net of disposals	(567)	(3,922)	(934)
Proceeds from sale of a business	660	0	0
Purchase of business, net of cash acquired	(25,041)	(6,500)	0
Net cash used in investing activities of continuing operations	(24,948)	(10,422)	(934)
Net cash provided by discontinued operations	1,825	0	0
Net cash used in investing activities	(23,123)	(10,422)	(934)
Cash flows from financing activities:
Repurchase of common stock	(10,235)	0	0
Proceeds from the exercise of stock options	290	5,641	8,578
Dividends paid	(14,927)	(14,833)	(14,632)
Net cash used in financing activities of continuing operations	(24,872)	(9,192)	(6,054)
Net change in cash and cash equivalents	(31,184)	(19,994)	22,032
Cash and cash equivalents at beginning of year	90,696	110,690	88,658
Cash and cash equivalents at end of year	59,512	90,696	110,690
Supplemental disclosures of cash paid during the year for:
Income taxes	5,754	8,511	300
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 3,657	$ 3,756	$ 3,700