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Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
7 Months Ended 12 Months Ended
Aug. 01, 2017
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]          
Value of common stock issued     $ 53,938   $ 247,575
Working capital adjustment         425
Fair value of tangible assets acquired   $ 30,756 30,756   19,709
Fair value of acquired finite lived intangible assets   90,830 90,830   120,080
Deferred tax asset   895 895    
Employees          
Business Acquisition [Line Items]          
Transaction costs     9,000    
Business combination separtely recognised transactions liabiliites recognised   5,200 5,200    
Selling, general and administrative          
Business Acquisition [Line Items]          
Transaction costs   4,000 4,000    
Spectrum Inc.          
Business Acquisition [Line Items]          
Cash consideration $ 122,932        
Shares issued for business acquisition 6,153,995        
Value of common stock issued $ 247,575        
Working capital adjustment 425        
Business combination, consideration transferred 370,932        
Fair value of net assets acquired 370,900        
Fair value of acquired finite lived intangible assets   90,800 90,800    
Acquisition of C Technologies, Inc.       $ 203  
Business acquisition, revenue $ 19,400        
Cash consideration for future employment     9,000    
Business acquisitions proforma net loss         17,220
Spectrum Inc. | Selling, general and administrative          
Business Acquisition [Line Items]          
Business Combination, Acquisition Related Costs       2,900 $ 7,100
C Technologies, Inc.          
Business Acquisition [Line Items]          
Cash     195,000    
Cash consideration     $ 185,949    
Shares issued for business acquisition     779,221    
Value of common stock issued     $ 53,938    
Business combination, consideration transferred     239,887    
Fair value of net assets acquired   239,887 239,887    
Fair value of tangible assets acquired   7,100 7,100    
Acquisition of C Technologies, Inc.     142,021    
Business acquisition, revenue   16,400      
Business acquisitions proforma net loss   7,400 23,394 $ 21,195  
Deferred tax asset   900 900    
C Technologies, Inc. | Accounting Standards Update Two Thousands Fifteen to Sixteen [Member]          
Business Acquisition [Line Items]          
Cash consideration     186,000    
C Technologies, Inc. | Goodwill [Member]          
Business Acquisition [Line Items]          
Intangible Asset Residual Value   $ 142,000 $ 142,000