Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended	128 Months Ended
	May 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2012	May 07, 2003
Schedule Of Investments [Line Items]
Cash to fund operations		$ 59,713,424	$ 2,931,032	$ 19,114,444	$ 59,713,424	$ 3,377,288
Maturity description		less than 24 months
Net increase (decrease) in cash		40,598,980	(446,256)		59,713,424
Cash from issuance of equity	36,000,000	60,000,000
Net cash invested in fixed income investments		15,000,000
Cash outflow related to continuing operating activities		7,000,000
Capital expenditures		100,000
Restricted Cash		0	0		0
Amount insured in FDIC per account		250,000			250,000
Amortized cost of bonds		25,750,603		10,732,414	25,750,603
Unrealized Loss on Securities		217,216		41,643
Unrealized Gain on Securities		0		7,500
Fair value of investments		25,533,387		10,698,271	25,533,387
Minority equity investment, book value		0			0
Minimum
Schedule Of Investments [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Maximum
Schedule Of Investments [Line Items]
Property, Plant and Equipment, Useful Life		7 years
Commercial bonds
Schedule Of Investments [Line Items]
Maturity description		less than 24 months
Investments		25,700,000			25,700,000
Warrants Issued
Schedule Of Investments [Line Items]
Cash from exercise of Warrants		$ 2,800,000