Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Cash flows from operating activities:
Net earnings	$ 1,033	$ 9,199
Earnings from discontinued operations, net of tax	0	(1,812)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	3,509	3,641
Stock-based compensation expense	4,808	4,720
Net gain on investments	(380)	(1,331)
Deferred income taxes	(3,119)	282
Gain on sale of business	0	(1,438)
Gain on sale of discontinued operations	0	(2,124)
Changes in operating assets and liabilities:
Purchases of trading securities	(46,309)	(3,958)
Proceeds from sales and maturities of trading securities	26,035	6,772
Accounts receivable, net	5,568	4,267
Prepaid expenses and other assets	1,034	(1,150)
Accounts payable and other liabilities	3,489	(3,854)
Deferred revenue	(9,511)	(5,298)
Net cash (used in) provided by operating activities of continuing operations	(13,843)	7,916
Net cash provided by operating activities of discontinued operations	0	1,554
Net cash (used in) provided by operating activities	(13,843)	9,470
Cash flows from investing activities:
Purchases of property and equipment, net of disposals	(383)	(539)
Purchase of business, net of cash acquired	0	(25,041)
Proceeds from sale of business	0	660
Net cash used in investing activities of continuing operations	(383)	(24,920)
Net cash provided by investing activities of discontinued operations	0	1,825
Net cash used in investing activities	(383)	(23,095)
Cash flows from financing activities:
Proceeds from exercise of stock options	100	290
Purchases of common stock	0	(10,235)
Dividends paid	(11,027)	(11,272)
Net cash used in financing activities of continuing operations	(10,927)	(21,217)
Net change in cash and cash equivalents	(25,153)	(34,842)
Cash and cash equivalents at beginning of period	59,512	90,696
Cash and cash equivalents at end of period	34,359	55,854
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	5,831	4,345
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	3,706	3,654
Conversion of B shares to common stock	$ 3,756	$ 0