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Subsequent Events - Additional Information (Detail) - USD ($) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 05, 2017 | Apr. 18, 2017 | Mar. 31, 2017 | Dec. 31, 2014
Senior convertible notes due December 31, 2019 |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of notes to common shares, value |  |  | $ 5,000,000 |
Less portion of commitment asset |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Cash repayment of senior notes under exchange agreement |  |  | 4,000,000 |
Conversion of notes to common shares, value |  |  | $ 1,000,000 |
Deerfield |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of notes to common shares, shares |  |  |  | 3,464,616
Deerfield | Less portion of commitment asset | Senior convertible notes due December 31, 2019 | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Cash repayment of senior notes under exchange agreement |  | $ 4,000,000 |  |
Conversion of notes to common shares, value |  | $ 1,000,000 |  |
Deerfield | Tranche B Exchange Shares | Senior convertible notes due December 31, 2019 | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of notes to common shares, shares |  | 869,565 |  |
Exchange price per share |  | $ 1.15 |  |
Deerfield | Tranche 1 Notes | Senior convertible notes due December 31, 2019 | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Conversion of notes to common shares, value |  | $ 5,000,000 |  |
Conversion of notes to common shares, shares |  | 4,347,826 |  |
Russell Ranch Road II LLC [Member] | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Lease monthly rental payments | $ 40,951 |  |  |
Percentage of annual increase in lease payment | 3.00% |  |  |
Lease expiration period | 65 months |  |  |
Lease renewal option | 5 years |  |  |

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- Definition Operating Leases Annual Increase in Rent Expense + References No definition available. + Details
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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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