Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Cash flows from operating activities:
Net earnings	$ 1,152	$ 1,385
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	2,245	1,798
Stock-based compensation expense	443	398
Net (gain) on investments	(63)	(388)
Deferred income taxes	(157)	28
Changes in operating assets and liabilities:
Purchases of trading securities	(8,739)	(2,857)
Proceeds from maturities and sales of trading securities	10,727	5,758
Accounts receivable, net	(207)	5,466
Prepaid expenses and other assets	(171)	330
Accounts payable and other liabilities	160	(4,223)
Deferred revenue	(579)	(3,334)
Net cash provided by operating activities	4,811	4,361
Cash flows from investing activities:
Capitalized computer software development costs	(1,285)	(884)
Purchases of property and equipment, net of disposals	(110)	(714)
Net cash used in investing activities	(1,395)	(1,598)
Cash flows from financing activities:
Proceeds from exercise of stock options	1,452	2,666
Dividends paid	(3,434)	(3,368)
Net cash used in financing activities	(1,982)	(702)
Net change in cash and cash equivalents	1,434	2,061
Cash and cash equivalents at beginning of period	61,288	52,794
Cash and cash equivalents at end of period	62,722	54,855
Cash paid during the period for:
Income taxes, net of refunds	105	27
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 3,451	$ 3,400