Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Cash flows from operating activities:
Net earnings	$ 2,034	$ 1,152
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,680	2,245
Stock-based compensation expense	546	443
Net gain on investments	(875)	(63)
Deferred income taxes	61	(157)
Changes in operating assets and liabilities:
Purchases of trading securities	(261)	(8,739)
Proceeds from maturities and sales of trading securities	2,745	10,727
Accounts receivable, net	(1,455)	(207)
Prepaid expenses and other assets	521	(171)
Accounts payable and other liabilities	(1,778)	160
Deferred revenue	(1,739)	(579)
Net cash provided by operating activities	1,479	4,811
Cash flows from investing activities:
Capitalized computer software development costs	(245)	(1,285)
Purchases of property and equipment, net of disposals	(118)	(110)
Net cash used in investing activities	(363)	(1,395)
Cash flows from financing activities:
Proceeds from exercise of stock options	2,383	1,452
Dividends paid	(3,547)	(3,434)
Net cash used in financing activities	(1,164)	(1,982)
Net change in cash and cash equivalents	(48)	1,434
Cash and cash equivalents at beginning of period	79,814	61,288
Cash and cash equivalents at end of period	79,766	62,722
Cash paid during the period for:
Income taxes, net of refunds	0	105
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 3,571	$ 3,451