Summary Of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Summary Of Significant Accounting Policy [Line Items]
Reverse Stock Split	0.01258			0.01258
Impairment losses				$ 0		$ 0
Contract revenue			2,913,000	0	3,037,000
Reserves for uncertain tax positions	0	0		0		0
Interest or penalties related to income taxes		$ 0		$ 0
Minimum
Summary Of Significant Accounting Policy [Line Items]
Property and equipment, estimated useful lives				3 years
Maximum
Summary Of Significant Accounting Policy [Line Items]
Property and equipment, estimated useful lives				7 years