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Commitments and Contingencies - Contingencies - Additional Information (Details)
$ in Thousands
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended 50 Months Ended
Apr. 30, 2016
USD ($)
Jul. 31, 2016
claim
Mar. 31, 2018
claim
Dec. 31, 2016
USD ($)
Apr. 30, 2016
USD ($)
Licensing and patent infringement suit          
Loss Contingencies [Line Items]          
Damages awarded to Trans Ova $ 528        
Cumulative payments for royalties and licenses         $ 3,170
Royalty payments not yet deposited 2,759       $ 2,759
Litigation settlement expense       $ 4,228  
Licensing and patent infringement suit | XY, LLC          
Loss Contingencies [Line Items]          
Damages awarded against Trans Ova $ 6,066        
Claims dismissed | claim     9    
Total claims | claim     12    
Claims pending resolution | claim     3    
Shareholder demand regarding allegations made by Seeking Alpha financial blog          
Loss Contingencies [Line Items]          
Number of lawsuits | claim   2