Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Cash flows from operating activities:
Net earnings	$ 1,534	$ 1,593
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,382	1,029
Stock-based compensation expense	404	338
Bond amortization		2
Accretion of liability from purchase of business	3
Tax benefit of stock options exercised	36	10
Excess tax benefits from stock-based compensation	(41)	(27)
Net loss on investments	159	361
Deferred income taxes	(281)	(194)
Changes in operating assets and liabilities, net of effects of acquisition:
Purchases of trading securities	(6,003)	(3,640)
Proceeds from maturities and sales of trading securities	3,385	8,157
Accounts receivable, net	2,463	3,683
Prepaid expenses and other assets	965	316
Accounts payable and other liabilities	(2,362)	(692)
Deferred revenue	(519)	(1,685)
Net cash provided by operating activities	1,125	9,251
Cash flows from investing activities:
Capitalized computer software development costs	(178)	(717)
Purchases of property and equipment, net of disposals	(58)	(34)
Proceeds from maturities of investments		200
Purchase of business, net of cash acquired	(7,881)
Net cash used in investing activities	(8,117)	(551)
Cash flows from financing activities:
Excess tax benefits from stock based compensation	41	27
Proceeds from exercise of stock options	183	487
Dividends paid	(2,826)
Net cash (used in) provided by financing activities	(2,602)	514
Net change in cash and cash equivalents	(9,594)	9,214
Cash and cash equivalents at beginning of period	55,803	41,164
Cash and cash equivalents at end of period	$ 46,209	$ 50,378