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Symphony Dynamo, Inc. - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended
Oct. 31, 2013
May 09, 2012
Nov. 03, 2011
Nov. 02, 2010
Apr. 30, 2010
Apr. 16, 2010
Nov. 30, 2009
Apr. 18, 2006
Jun. 30, 2010
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Apr. 30, 2007
Dec. 31, 2011
Fair Value, Inputs, Level 3
Dec. 31, 2010
Fair Value, Inputs, Level 3
Jun. 30, 2010
Warrant Liability
Apr. 18, 2006
Maximum
Dec. 31, 2013
SDI
Apr. 18, 2006
SDI
Apr. 18, 2006
Holdings
Business Acquisition Equity Interests Issued Or Issuable [Line Items]                                        
Investments in SDI                                     $ 50,000,000  
Ownership percentage by parent                                     100.00% 100.00%
Warrants issued to purchase common stock         7,038,210   2,000,000                   2,000,000      
Warrants exercisable period         5 years 5 years 5 years 5 years                        
Warrants exercise price         1.50 1.50 1.94 7.32   1.96                    
Warrant exercised                         15,000,000              
Common stock issue on acquisition             13,000,000                          
Issued note to Holdings, principal amount             15,000,000                          
Principal amount, due date             Dec. 31, 2012                          
Business acquisition contingent consideration percentage             50.00%                          
Business acquisition upfront payment             50,000,000                          
Net present value model, discount rate                   17.00%                    
Repayment of note payable                     15,000,000                  
Issuance of common stock, net of issuance costs (in shares) 79,570,000 17,500,000 27,600,000 26,450,000 1,076,420 30,293,000                            
Non operating income expense                 11,100,000                      
Changes in warrant and contingent consideration liability                           800,000 2,200,000 9,500,000        
Increase in additional paid in capital                               1,600,000        
Reclassification of warranty liability into equity                               12,000,000        
Warrants outstanding                   10,913,873               6,765,128    
Cash flows discounted rate                       16.00%                
Estimated fair value of contingent liability                           $ 0