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Convertible Debt - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended 1 Months Ended
Sep. 30, 2013
May 17, 2013
Pyxis Innovations Inc [Member]
Line of Credit [Member]
Aug. 17, 2006
Pyxis Innovations Inc [Member]
Line of Credit [Member]
Aug. 17, 2006
Pyxis Innovations Inc [Member]
Working Capital [Member]
Debt Instrument [Line Items]        
Working capital borrowings       $ 14.3
Credit facility extended date Mar. 31, 2014      
Convertible debt conversion price     $ 5.6783  
Debt Conversion, Converted Instrument, Shares Issued   2,521,222