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Acquisition of C Technologies, Inc. - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 4 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Business Acquisition [Line Items]          
Cash consideration     $ 182,154    
Value of common stock issued     53,938    
Fair value of tangible assets acquired $ 30,756 $ 30,756 30,756    
Fair value of acquired finite lived intangible assets 90,830 90,830 90,830    
Goodwill 468,845 468,845 468,845   $ 326,735
Acquisition-related Costs [Member]          
Business Acquisition [Line Items]          
Transaction costs 4,000 4,000 4,000    
Fair Value Adjustment to Inventory [Member]          
Business Acquisition [Line Items]          
Inventory purchase accounting adjustments     1,500    
Selling, general and administrative          
Business Acquisition [Line Items]          
Transaction costs     4,000    
Spectrum Inc.          
Business Acquisition [Line Items]          
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 tangible assets acquired 6,200 6,200 6,200    
Fair value of acquired finite lived intangible assets 90,800 90,800 90,800    
Cash consideration for future employment     9,000    
C Technologies          
Business Acquisition [Line Items]          
Cash consideration     195,000    
Fair value of acquired finite lived intangible assets 90,800 90,800 90,800    
Goodwill 142,903 142,903 142,903    
Business acquisition, revenue 7,000 9,100      
Pro forma adjustments amortization     3,600   4,000
Pro forma adjustments stock based compensation     500   $ 500
Business acquisitions proforma net loss 1,200 2,700 21,012 $ 15,205  
C Technologies | Accounting Standards Update 2015-16 [Member]          
Business Acquisition [Line Items]          
Cash consideration     186,000    
C Technologies | Goodwill [Member]          
Business Acquisition [Line Items]          
Intangible Asset Residual Value $ 142,900 $ 142,900 $ 142,900