Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Cash flows from operating activities:
Net earnings	$ 1,385	$ 2,725
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,798	1,385
Stock-based compensation expense	398	316
Net gain on investments	(388)	(113)
Deferred income taxes	28	120
Changes in operating assets and liabilities:
Purchases of trading securities	(2,857)	(5,439)
Proceeds from maturities and sales of trading securities	5,758	5,010
Accounts receivable, net	5,466	3,504
Prepaid expenses and other assets	330	255
Accounts payable and other liabilities	(4,223)	(2,669)
Deferred revenue	(3,334)	(1,079)
Net cash provided by operating activities	4,361	4,015
Cash flows from investing activities:
Capitalized computer software development costs	(884)	(1,287)
Purchases of property and equipment, net of disposals	(714)	(133)
Net cash used in investing activities	(1,598)	(1,420)
Cash flows from financing activities:
Proceeds from exercise of stock options	2,666	890
Dividends paid	(3,368)	(3,259)
Net cash used in financing activities	(702)	(2,369)
Net change in cash and cash equivalents	2,061	226
Cash and cash equivalents at beginning of period	52,794	66,001
Cash and cash equivalents at end of period	$ 54,855	$ 66,227