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Property and Equipment | 6 Months Ended
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Oct. 31, 2013
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment Disclosure [Text Block] | Note 2. Property and Equipment Property and equipment is recorded at cost and consists of laboratory equipment, furniture and fixtures, and computer hardware and software. Depreciation is calculated on a straight-line basis over the estimated useful lives of the various assets ranging from three to seven years. Property and equipment consisted of the following (in thousands):
|  | October 31, |  | April 30, |
|  | 2013 |  | 2013 |
|  | (unaudited) |  |  |  |
Furniture and fixtures |  | $ | 59 |  | $ | 59 |
Computer equipment and software |  |  | 620 |  |  | 549 |
Laboratory equipment |  |  | 185 |  |  | 179 |
Leasehold improvements |  |  | 2 |  |  | 2 |
Total property and equipment |  |  | 866 |  |  | 789 |
Less: Accumulated depreciation |  |  | (479) |  |  | (375) |
Property and equipment, net |  | $ | 387 |  | $ | 414 |
Depreciation expense was $53,000 and $49,000 for the three months ended October 31, 2013 and 2012, respectively, and $102,000 and $103,000 for the six months ended October 31, 2013 and 2012, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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