Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Operating activities:
Net loss	$ (15,096)	$ (21,473)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization expense	6,978	6,050
Loss on disposal of discontinued operations, net of tax	0	1,537
Stock-based expense	7,958	6,589
Bad debt expense	61	1,223
Excess tax benefit related to stock-based expense	0	(1)
Amortization of deferred financing costs	118	0
Other non-cash expense	45	229
Changes in operating assets and liabilities:
Accounts receivable	11,942	(2,156)
Prepaid expenses and other current assets	977	(508)
Other non-current assets	(930)	(205)
Accounts payable	2,149	455
Accrued expenses and other current liabilities	(6,008)	(1,355)
Deferred revenue	(3,850)	(1,794)
Other liabilities, long-term	2,960	(736)
Net cash provided by (used in) operating activities	7,304	(12,145)
Investing activities:
Proceeds from sale of discontinued operations	4,501	25,500
Purchases of property, equipment and capitalized internal-use software development costs	(10,455)	(6,238)
Decrease in restricted cash	0	(500)
Purchases of short-term investments	(39,855)	(41,047)
Proceeds from maturities of short-term investments	40,517	28,015
Proceeds from sale of short-term investments	0	5,012
Net cash provided by (used in) investing activities	(5,292)	10,742
Financing activities:
Proceeds from employee stock compensation plans	2,113	2,799
Excess tax benefit related to stock-based expense	0	1
Net cash provided by financing activities	2,113	2,800
Effect of exchange rate fluctuations on cash and cash equivalents	(94)	(476)
Net change in cash and cash equivalents	4,031	921
Cash and cash equivalents at beginning of period	54,041	31,934
Cash and cash equivalents at end of period	58,072	32,855
Supplemental disclosure of other cash flow information:
Cash paid for income taxes, net of refunds	515	717
Cash paid for interest	1,075	451
Supplemental disclosure of non-cash investing and financing activities:
Purchase of fixed assets recorded in accounts payable	$ 1,859	$ 0