Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Operating activities:
Net loss	$ (2,371)	$ (9,239)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	7,076	7,110
Stock-based expense	9,349	8,183
Bad debt expense (recovery)	207	(243)
Amortization of deferred financing costs	137	118
Gain (Loss) on Contract Termination	0	(501)
Other non-cash expense	(33)	(127)
Changes in operating assets and liabilities:
Accounts receivable	2,083	2,345
Prepaid expenses and other current assets	1,335	(514)
Other non-current assets	(341)	958
Accounts payable	83	(2,404)
Accrued expenses and other current liabilities	(5,125)	(4,569)
Deferred revenue	(2,470)	(88)
Other liabilities, long-term	(123)	(312)
Net cash provided by operating activities	9,807	1,719
Investing activities:
Purchases of property, equipment and capitalized internal-use software development costs	(4,595)	(4,873)
Purchases of short-term investments	(20,215)	(15,040)
Proceeds from maturities of short-term investments	20,814	23,880
Proceeds from sale of short-term investments	24,847	0
Net cash provided by investing activities	20,851	3,967
Financing activities:
Proceeds from employee stock compensation plans	582	724
Payments on revolving line of credit	32,000	5,000
Net cash used in financing activities	(31,418)	(4,276)
Effect of exchange rate fluctuations on cash and cash equivalents	254	(946)
Net change in cash and cash equivalents	(506)	464
Cash and cash equivalents at beginning of period	52,494	43,963
Cash and cash equivalents at end of period	51,988	44,427
Supplemental disclosure of non-cash investing and financing activities:
Purchase of fixed assets recorded in accounts payable and accrued expenses	964	85
Purchase of leasehold improvements funded by tenant improvement allowance	925	0
Capitalized stock-based compensation	$ 300	$ 246