Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Cash flows from operating activities:
Net earnings	$ 2,947	$ 2,034
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,131	1,680
Stock-based compensation expense	775	546
Net gain on investments	(376)	(875)
Deferred income taxes	(25)	61
Changes in operating assets and liabilities:
Purchases of trading securities	(63)	(261)
Proceeds from maturities and sales of trading securities	165	2,745
Accounts receivable, net	1,766	(1,455)
Prepaid expenses and other assets	(1,606)	521
Accounts payable and other liabilities	(1,459)	(1,778)
Deferred revenue	(221)	(1,739)
Net cash provided by operating activities	3,034	1,479
Cash flows from investing activities:
Capitalized computer software development costs	0	(245)
Purchases of property and equipment, net of disposals	(302)	(118)
Net cash used in investing activities	(302)	(363)
Cash flows from financing activities:
Proceeds from exercise of stock options	4,072	2,383
Dividends paid	(3,608)	(3,547)
Net cash provided by\(used in) financing activities	464	(1,164)
Net change in cash and cash equivalents	3,196	(48)
Cash and cash equivalents at beginning of period	88,658	79,814
Cash and cash equivalents at end of period	91,854	79,766
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 3,651	$ 3,571