Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Operating activities:
Net loss	$ (11,565)	$ (17,368)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization expense	2,810	3,476
Loss on disposal of discontinued operations, net of tax	1,537
Stock-based expense	3,246	4,008
Bad debt expense	601	566
Excess tax benefit related to stock-based expense	(1)	(90)
Other non-cash expense	169	82
Changes in operating assets and liabilities:
Accounts receivable	435	2,507
Prepaid expenses and other current assets	(145)	(356)
Other non-current assets	(319)	(523)
Accounts payable	208	(474)
Accrued expenses and other current liabilities	(2,388)	1,729
Deferred revenue	2,349	(2,432)
Other liabilities, long-term	(349)	(239)
Net cash used in operating activities	(3,412)	(9,114)
Investing activities:
Acquisitions, net of cash acquired, and purchase of intangible asset		(205)
Proceeds from sale of discontinued operations	25,500
Purchases of property, equipment and capitalized internal-use software development costs	(3,280)	(3,963)
Purchases of short-term investments	(38,858)	(25,161)
Proceeds from maturities of short-term investments	11,655	21,250
Proceeds from sale of short-term investments		16,018
Net cash provided by (used in) investing activities	(4,983)	7,939
Financing activities:
Proceeds from employee stock compensation plans	1,156	2,837
Excess tax benefit related to stock-based expense	1	90
Net cash provided by financing activities	1,157	2,927
Effect of exchange rate fluctuations on cash and cash equivalents	8	(57)
Net change in cash and cash equivalents	(7,230)	1,695
Cash and cash equivalents at beginning of period	31,934	25,045
Cash and cash equivalents at end of period	24,704	26,740
Supplemental disclosure of other cash flow information:
Cash paid for income taxes	461	357
Cash paid for interest	$ 222