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Stockholders' Equity - Summary of Information About Warrants (Detail) - Jun. 30, 2015 - $ / shares | Total
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Class Of Warrant Or Right [Line Items] |
Warrants outstanding | 1,437,011
Warrant 1 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 70.60
Warrants outstanding | 94,897
Remaining Life in Years | 1 year 10 months 24 days
Warrant 2 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 5.00
Warrants outstanding | 390,625
Remaining Life in Years | 1 year
Warrant 3 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 5.09
Warrants outstanding | 239,534
Remaining Life in Years | 1 year
Warrant 4 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 1.38
Warrants outstanding | 24,324
Remaining Life in Years | 6 months
Warrant 5 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 4.16
Warrants outstanding | 1,000
Remaining Life in Years | 1 year 6 months
Warrant 6 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 3.25
Warrants outstanding | 334,347
Remaining Life in Years | 1 year 1 month 6 days
Warrant 7 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 2.12
Warrants outstanding | 75,000
Remaining Life in Years | 2 years 6 months
Warrant 8 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ 1.83
Warrants outstanding | 277,284
Remaining Life in Years | 2 years 6 months

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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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