Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Cash flows from operating activities:
Net earnings	$ 8,128	$ 10,331	$ 10,411
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	5,833	2,605	4,153
Stock-based compensation expense	1,530	1,509	1,476
Bond amortization		1	15
Accretion of liability from purchase of business	11	8
Tax benefit of options exercised	420	615	133
Excess tax benefits from stock-based compensation	(384)	(611)	(131)
Net loss (gain) on investments	638	304	(328)
Retirement of property and equipment			90
Deferred income tax (benefit) expense	(723)	956	192
Changes in operating assets and liabilities, net of effects of acquisition:
Purchases of trading securities	(18,806)	(14,751)	(14,710)
Proceeds from sales and maturities of trading securities	11,204	15,702	16,334
Accounts receivable, net	(400)	(1,609)	2,892
Prepaid expenses and other assets	350	(1,218)	22
Accounts payable and other liabilities	(1,870)	1,465	(3,271)
Deferred revenue	4,093	3,004	1,850
Net cash provided by operating activities	10,024	18,311	19,128
Cash flows from investing activities:
Capitalized computer software development costs	(2,747)	(2,949)	(3,418)
Purchases of property and equipment, net of disposals	(1,028)	(255)	(736)
Proceeds from maturities of investments		225	1,188
Purchase of business, net of cash acquired	(7,909)	(1,241)
Net cash used in investing activities	(11,684)	(4,220)	(2,966)
Cash flows from financing activities:
Repurchase of common stock	(1,100)		(759)
Excess tax benefits from stock-based compensation	384	611	131
Proceeds from exercise of stock options	2,725	5,476	1,990
Payment for accrued acquisition consideration	(200)
Dividends paid	(11,297)	(5,539)	(15,471)
Net cash (used in) provided by financing activities	(9,488)	548	(14,109)
Net change in cash and cash equivalents	(11,148)	14,639	2,053
Cash and cash equivalents at beginning of year	55,803	41,164	39,111
Cash and cash equivalents at end of year	44,655	55,803	41,164
Supplemental disclosures of cash paid during the year for:
Income taxes	2,597	4,565	$ 5,206
Supplemental disclosures of noncash operating, investing and financing activities:
Accrual of dividends payable	$ 2,861	$ 2,822