Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended
	Dec. 28, 2012	Sep. 30, 2013	Dec. 31, 2012
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Reverse stock split of the Company's common stock	0.083
Accumulated deficit		$ (236,411,000)	$ (225,432,000)
Cash and restricted cash		8,797,000
Period of inspection of product		30 days
Percentage payment on gross margin of distributor's, sales		20.00%
Cost of goods sold		$ 0