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WARRANTS (Details) | 1 Months Ended |  |  |  |  |  |
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Apr. 30, 2015 | Dec. 31, 2013 shares | Aug. 31, 2014 $ / shares shares | Feb. 28, 2014 $ / shares shares | Jan. 31, 2014 $ / shares shares | Aug. 28, 2012 $ / shares shares | Feb. 29, 2012 shares | Nov. 30, 2010 $ / shares shares
Performance adjustment ratio | 0.144927536 |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |
Performance adjustment ratio |  | 0.5 |  |  |  |  |  |
Series A convertible redeemable preferred stock |  |  |  |  |  |  |  |
Performance adjustment ratio |  | 0.5 |  |  |  |  |  |
Preferred stock warrant issued November 2010 |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  |  |  |  |  |  | 33,746
Exercise price of warrant (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 1.778
Series A preferred stock warrant |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  | 16,873 |  |  |  |  |  |
Common stock warrant, Silicon Valley Bank, Original Term Loan |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  |  |  |  | 23,810 |  |
Exercise price of warrant (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.07 |  |
Common stock warrant, Silicon Valley Bank, Term Loan, Amendment No. 1 |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  |  | 14,430 |  |  |  |
Exercise price of warrant (in dollars per share) | $ / shares |  |  |  | $ 0.05 |  |  |  |
Common stock warrant, Silicon Valley Bank, Term Loan, Amendment No. 2 |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  | 86,580 |  |  |  |  |
Exercise price of warrant (in dollars per share) | $ / shares |  |  | $ 0.05 |  |  |  |  |
Conversion of preferred stock warrant into Series A Preferred Stock warrant | Series A preferred stock warrant |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  |  |  |  |  | 33,746 |
Pro Forma | Common stock warrant, Silicon Valley Bank, Original Term Loan |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  | 1,725 |  |  |  | 3,450 |  |
Exercise price of warrant (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.48 |  |
Pro Forma | Common stock warrant, Silicon Valley Bank, Term Loan, Amendment No. 1 |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  |  |  | 2,091 |  |  |
Exercise price of warrant (in dollars per share) | $ / shares |  |  |  |  | $ 0.35 |  |  |
Pro Forma | Common stock warrant, Silicon Valley Bank, Term Loan, Amendment No. 2 |  |  |  |  |  |  |  |
Stock that may be purchased upon exercise of warrant (in shares) |  |  | 12,548 |  |  |  |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Stock Split -URI http://asc.fasb.org/extlink&oid=6525746 + Details
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