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Stockholders' Equity - Summary of Information About Warrants (Detail) | 6 Months Ended
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Mar. 31, 2017 $ / shares shares
Class Of Warrant Or Right [Line Items] |
Warrants outstanding | 527,181
Warrant 1 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ / shares | $ 70.60
Warrants outstanding | 94,897
Remaining Life in Years | 1 month 6 days
Warrant 2 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ / shares | $ 2.12
Warrants outstanding | 75,000
Remaining Life in Years | 10 months 24 days
Warrant 3 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ / shares | $ 1.83
Warrants outstanding | 277,284
Remaining Life in Years | 8 months 12 days
Warrant 4 |
Class Of Warrant Or Right [Line Items] |
Exercise prices | $ / shares | $ 7.14
Warrants outstanding | 80,000
Remaining Life in Years | 1 year 2 months 12 days

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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 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)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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