Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Cash flows from operating activities:
Net earnings	$ 7,554	$ 9,201
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	2,389	3,170
(Gain) on sale of fixed assets	0	(36)
Stock-based compensation expense	3,944	2,910
Net gain on investments	(92)	(1,073)
Deferred income taxes	(3,377)	(167)
Changes in operating assets and liabilities:
Purchases of trading securities	(8,284)	(215)
Proceeds from maturities and sales of trading securities	870	831
Accounts receivable, net	(10,926)	(780)
Prepaid expenses and other assets	189	(653)
Accounts payable and other liabilities	(1,486)	(91)
Deferred revenue	(1,247)	953
Net cash (used in) provided by operating activities	(10,466)	14,050
Cash flows from investing activities:
Purchases of property and equipment, net of disposals	(3,655)	(801)
Purchase of business	(6,500)	0
Net cash (used in) investing activities	(10,155)	(801)
Cash flows from financing activities:
Proceeds from exercise of stock options	1,654	7,405
Dividends paid	(11,117)	(10,957)
Net cash (used in) financing activities	(9,463)	(3,552)
Net change in cash and cash equivalents	(30,084)	9,697
Cash and cash equivalents at beginning of period	110,690	88,658
Cash and cash equivalents at end of period	80,606	98,355
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	5,441	180
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 3,716	$ 3,689