UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
Oct. 31, 2014	Oct. 31, 2013
Operating activities:
Net loss	$ (6,684)us-gaap_NetIncomeLoss	$ (4,556)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,627us-gaap_ShareBasedCompensation	1,028us-gaap_ShareBasedCompensation
Depreciation expense	110us-gaap_DepreciationAndAmortization	102us-gaap_DepreciationAndAmortization
Change in fair value of warrant liability	(780)	2,048
Changes in operating assets and liabilities:
Accounts receivable	210	(962)
Prepaid expenses, deposits and other	(10)	96
Restricted cash	1	(1)
Accounts payable	651	(220)
Accrued liabilities	(41)	(282)
Deferred revenue	(331)	845
Net cash used in operating activities	(5,247)	(1,902)
Investing activities:
Purchase of property and equipment	(71)	(76)
Net cash used in investing activities	(71)	(76)
Financing activities:
Proceeds from exercise of options	2	9
Net cash provided by financing activities	2	9
Exchange rate effect on cash and cash equivalents	0	(20)
Decrease in cash and cash equivalents	(5,316)	(1,989)
Cash and cash equivalents, beginning of period	5,891	9,561
Cash and cash equivalents, end of period	$ 575	$ 7,572

The cash inflow associated with the amount received from holders exercising their stock options and warrants.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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