Exchange right convertible conversion ratio for first year.

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- Definition

Exchange right convertible conversion ratio for five year.

+ References

No definition available.

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- Definition

Exchange right convertible conversion ratio for four year.

+ References

No definition available.

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- Definition

Exchange right convertible conversion ratio for three year.

+ References

No definition available.

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- Definition

Exchange right convertible conversion ratio for two year.

+ References

No definition available.

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- Definition

Number of exchange right are sold.

+ References

No definition available.

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- Definition

Term of exchange rights.

+ References

No definition available.

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- Definition

Warrants issued to acquire common stock.

+ References

No definition available.

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- Definition

Number of warrants or rights outstanding.

+ References

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-Topic 235

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-Name Regulation S-X (SX)

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-Section 08

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- Definition

Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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-Publisher FASB

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-Publisher SEC

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-Section 03

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-Subparagraph a, f, g

-Article 7

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Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

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-Subparagraph (SX 210.9-03.4)

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Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

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Total debt and equity financial instruments including: (1) securities held-to-maturity and (2) securities available-for-sale that will be held for the long-term.

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Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Jun. 30, 2010	Dec. 31, 2012	Jan. 31, 2013
Fair Value Measurements Disclosure [Line Items]
Short term investments	$ 23,532,402us-gaap_MarketableSecuritiesCurrent		$ 21,653,032us-gaap_MarketableSecuritiesCurrent
Investments	17,806,499us-gaap_MarketableSecuritiesNoncurrent		23,088,346us-gaap_MarketableSecuritiesNoncurrent
Total investments	41,338,901us-gaap_MarketableSecurities		44,741,378us-gaap_MarketableSecurities
Fair value of investment	40,759,068us-gaap_InvestmentsFairValueDisclosure		44,333,855us-gaap_InvestmentsFairValueDisclosure
Warrants outstanding	1,437,011
Non-cash gain (loss) from change in fair value of the derivative liability	2,179,651	(3,507,496)
Duration of exchange rights	7 years
Ablaris Therapeutics
Fair Value Measurements Disclosure [Line Items]
Warrants outstanding	585,000
Non-cash gain (loss) from change in fair value of the derivative liability	$ 202,491	$ (12,082)
Exchange right convertible conversion ratio for first year	0.06
Exchange right convertible conversion ratio for second year	0.04
Exchange right convertible conversion ratio for third year	0.03
Exchange right convertible conversion ratio for fourth year	0.02
Exchange right convertible conversion ratio for fifth year and beyond	0.01
Number of exchange right sold	675,000
2010 Warrants
Fair Value Measurements Disclosure [Line Items]
Warrants issued to acquire Common Stock				329,649
Warrants outstanding	24,324
2012 Warrants
Fair Value Measurements Disclosure [Line Items]
Warrants issued to acquire Common Stock					912,543
Warrants outstanding	265,161
2013 Warrants
Fair Value Measurements Disclosure [Line Items]
Warrants issued to acquire Common Stock						833,530
Warrants outstanding	12,123