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Convertible Notes Payable - December 2012 Convertible Note - Additional Information (Detail) (USD $)
0 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 0 Months Ended
Jun. 30, 2013
Prior to June 30 2013 [Member]
Non-Qualified financing [Member]
Jun. 30, 2013
After June 30 2013 [Member]
Non-Qualified financing [Member]
Dec. 06, 2012
December 2012 convertible note [Member]
Sep. 30, 2013
December 2012 convertible note [Member]
Dec. 31, 2012
December 2012 convertible note [Member]
Sep. 30, 2013
December 2012 convertible note [Member]
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Sep. 30, 2013
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Sep. 30, 2013
December 2012 convertible note [Member]
Qualified financing [Member]
Sep. 30, 2013
December 2012 convertible note [Member]
Prior to June 30 2013 [Member]
Sep. 30, 2013
December 2012 convertible note [Member]
Prior to June 30 2013 [Member]
Qualified financing [Member]
Sep. 30, 2013
December 2012 convertible note [Member]
After June 30 2013 [Member]
Sep. 30, 2013
December 2012 convertible note [Member]
After June 30 2013 [Member]
Qualified financing [Member]
Dec. 06, 2012
December 2012 convertible note [Member]
Operating expense [Member]
Dec. 06, 2012
December 2012 convertible note [Member]
Cost of license revenue [Member]
Dec. 06, 2012
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Product [Member]
Dec. 06, 2012
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Distributor [Member]
Debt Instrument [Line Items]                                
Company borrowed convertible note     $ 12,500,000                          
Convertible Note initial maturity term     2 years 10 months                          
Convertible Note additional maturity term     1 year                          
Maturity Date     Oct. 16, 2015 Oct. 16, 2015                        
Convertible Note interest percentage     10.00% 10.00%                        
Transfer of voting power percentage       50.00%                        
Outstanding principal balance       120,000,000                        
Conversion price percentage on a sale transaction                 133.33%   142.86%          
Gross proceeds qualified for conversion               20,000,000                
Convertible invested holder of the Company's equity, strategic investors               50.00%                
Convertible into share of common stock per share 75.00% 70.00%               75.00%   70.00%        
Discount on conversion price           25.00% 30.00%                  
Estimated fair value of Convertible Notes as of issuance dates     16,355,000 19,072,000 16,545,000                      
Excess of estimated fair value of Convertible Notes     3,855,000                   3,610,000 110,000 135,000 245,000
Change in estimated fair value of financial instruments       $ 1,767,000