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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2015 | Apr. 30, 2014
Operating activities: |  |
Net loss | $ (13,140) | $ (7,406)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation and modification expense | 3,162 | 2,807
Net foreign currency remeasurement loss | 0 | 124
Depreciation and amortization expense | 214 | 213
Change in fair value of warrant liability | (981) | 965
Modification of warrant liability | 586 | 0
Gain/loss on sales of assets | 5 | 0
Changes in operating assets and liabilities: |  |
Accounts receivable | 265 | (825)
Prepaid expenses, deposits and other | 37 | (68)
Restricted cash | 2 | 27
Accounts payable | 433 | (223)
Accrued liabilities | (232) | (24)
Other Non-current liability | 100 | 0
Deferred revenue | (82) | 977
Net cash used in operating activities | (9,630) | (3,433)
Investing activities: |  |
Purchase of property and equipment | (119) | (234)
Proceeds from sale of fixed assets | 5 | 0
Net cash used in investing activities | (114) | (234)
Financing activities: |  |
Private placement financing, net of financing costs of $880k | 11,220 | 0
Proceeds from Executive Note financing | 2,000 | 0
Capital lease payments | (12) | 0
Proceeds from exercise of options and warrants | 2 | 21
Net cash provided by financing activities | 13,210 | 21
Exchange rate effect on cash and cash equivalents | 0 | (24)
Increase (decrease) in cash and cash equivalents | 3,466 | (3,670)
Cash and cash equivalents, beginning of year | 5,891 | 9,561
Cash and cash equivalents, end of year | 9,357 | 5,891
Non-cash investing and financing activities: |  |
Purchased equipment under capital lease | 124 | 0
Conversion of executive note financing | 2,000 | 0
Reclassification of warrant liability to equity | $ 1,616 | $ 0

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_ShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration