Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Operating activities:
Net loss	$ (9,239)	$ (15,096)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	7,110	6,978
Stock-based expense	8,183	7,722
Bad debt expense (recovery)	(243)	61
Amortization of deferred financing costs	118	118
Loss on sublease	501	0
Other non-cash expense (benefit)	(127)	45
Changes in operating assets and liabilities:
Accounts receivable	2,345	11,942
Prepaid expenses and other current assets	(514)	977
Other non-current assets	958	(930)
Accounts payable	(2,404)	2,149
Accrued expenses and other current liabilities	(4,569)	(6,008)
Deferred revenue	(88)	(3,850)
Other liabilities, long-term	(312)	2,960
Net cash provided by operating activities	1,719	7,068
Investing activities:
Proceeds from sale of discontinued operations	0	4,501
Purchases of property, equipment and capitalized internal-use software development costs	(4,873)	(10,219)
Purchases of short-term investments	(15,040)	(39,855)
Proceeds from maturities of short-term investments	23,880	40,517
Net cash provided by (used in) investing activities	3,967	(5,056)
Financing activities:
Proceeds from employee stock compensation plans	724	2,113
Payments on revolving line of credit	5,000	0
Net cash provided by (used in) financing activities	(4,276)	2,113
Effect of exchange rate fluctuations on cash and cash equivalents	(946)	(94)
Net change in cash and cash equivalents	464	4,031
Cash and cash equivalents at beginning of period	43,963	54,041
Cash and cash equivalents at end of period	44,427	58,072
Supplemental disclosure of other cash flow information:
Cash paid for income taxes, net of refunds	450	515
Cash paid for interest	829	1,075
Supplemental disclosure of non-cash investing and financing activities:
Purchase of fixed assets recorded in accounts payable	85	1,859
Capitalized stock-based compensation	$ 246	$ 236