Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Cash flows from operating activities:
Net earnings	$ 2,709	$ 5,286
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:
Depreciation and amortization	2,839	1,462
Stock-based compensation expense	794	700
Bond amortization		1
Accretion of liability from purchase of business	3
Tax benefit of stock options exercised	81	88
Excess tax benefits from stock-based compensation	(78)	(68)
Net loss on investments	17	350
Deferred income taxes	(358)	(103)
Changes in operating assets and liabilities, net of effects of acquisition:
Purchases of trading securities	(10,882)	(7,412)
Proceeds from maturities and sales of trading securities	5,755	11,152
Accounts receivable, net	2,725	(118)
Prepaid expenses and other assets	(779)	(429)
Accounts payable and other liabilities	(2,853)	165
Deferred revenue	(235)	(1,438)
Net cash (used in) provided by operating activities	(262)	9,636
Cash flows from investing activities:
Capitalized computer software development costs	(846)	(1,641)
Purchases of property and equipment, net of disposals	(232)	(155)
Proceeds from maturities of investments		225
Purchase of business, net of cash acquired	(7,909)	(1,191)
Net cash used in investing activities	(8,987)	(2,762)
Cash flows from financing activities:
Repurchase of common stock	(780)
Excess tax benefits from stock based compensation	78	68
Proceeds from exercise of stock options	597	1,120
Payment for accrued acquisition consideration	(200)
Dividends paid	(5,648)
Net cash (used in) provided by financing activities	(5,953)	1,188
Net change in cash and cash equivalents	(15,202)	8,062
Cash and cash equivalents at beginning of period	55,803	41,164
Cash and cash equivalents at end of period	$ 40,601	$ 49,226