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Derivative Financial Instruments - Significant Assumptions Utilized in Binomial Lattice Process (Detail) (Level 3 [Member], USD $) |  | 6 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended
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Jun. 30, 2013 Warrant Group 1 [Member] | Jun. 30, 2013 Warrant Group 1 [Member] Minimum [Member] | Jun. 30, 2013 Warrant Group 1 [Member] Maximum [Member] | Jun. 30, 2013 Warrant Group 1 [Member] Derivative Financial Instruments, Assets [Member] | Sep. 30, 2013 Warrant Group 2 [Member] Minimum [Member] | Dec. 31, 2013 Warrant Group 2 [Member] Minimum [Member] | Sep. 30, 2013 Warrant Group 2 [Member] Maximum [Member] | Dec. 31, 2013 Warrant Group 2 [Member] Maximum [Member] | Sep. 30, 2013 Warrant Group 2 [Member] Derivative Financial Instruments, Assets [Member] | Dec. 31, 2013 Warrant Group 2 [Member] Derivative Financial Instruments, Assets [Member] | Sep. 30, 2014 Warrant Group 3 [Member] | Sep. 30, 2013 Warrant Group 3 [Member] | Sep. 30, 2014 Warrant Group 3 [Member] Minimum [Member] | Sep. 30, 2013 Warrant Group 3 [Member] Minimum [Member] | Dec. 31, 2013 Warrant Group 3 [Member] Minimum [Member] | Sep. 30, 2014 Warrant Group 3 [Member] Maximum [Member] | Sep. 30, 2013 Warrant Group 3 [Member] Maximum [Member] | Dec. 31, 2013 Warrant Group 3 [Member] Maximum [Member] | Sep. 30, 2014 Warrant Group 3 [Member] Derivative Financial Instruments, Assets [Member] | Sep. 30, 2013 Warrant Group 3 [Member] Derivative Financial Instruments, Assets [Member] | Dec. 31, 2013 Warrant Group 3 [Member] Derivative Financial Instruments, Assets [Member]
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Linked common shares |  |  |  | 1,725,000 |  |  |  |  | 525,000 | 525,000 |  |  |  |  |  |  |  |  | 1,562,500 | 1,562,500 | 1,562,500
Quoted market price on valuation date |  |  |  | $ 3.00 |  |  |  |  | $ 3.00 | $ 2.02 |  |  |  |  |  |  |  |  | $ 0.91 | $ 3.00 | $ 2.02
Contractual exercise rate |  |  |  | $ 2.4648 |  |  |  |  | $ 2.4648 | $ 2.3793 |  |  |  |  |  |  |  |  | $ 3.60 | $ 3.60 | $ 3.60
Term (years) |  |  |  | 11 days |  |  |  |  | 6 months 15 days | 3 months 11 days |  |  |  |  |  |  |  |  | 2 years 7 months 10 days | 3 years 7 months 10 days | 3 years 4 months 6 days
Range of market volatilities |  | 24.00% | 31.50% |  | 26.30% | 50.10% | 46.10% | 88.30% |  |  |  |  | 57.00% | 38.20% | 51.10% | 79.70% | 60.50% | 78.20% |  |  |
Risk free rates using zero coupon US Treasury Security rates | 0.03% |  |  |  | 0.02% | 0.01% | 0.04% | 0.07% |  |  |  |  | 0.02% | 0.02% | 0.07% | 0.58% | 0.63% | 0.78% |  |  |
Custom lattice variable: Probability of exercisability (434,027 linked common shares) |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |  |

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- Definition Fair Value Assumptions Linked Common Shares + References No definition available. + Details
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- Definition Fair value assumptions quoted price. + References No definition available. + Details
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- Definition Risk free rates using zero coupon country treasury security range of rates. + References No definition available. + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Agreed upon price for the exchange of the underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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