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Business Combination (Details) - Bioject
$ in Millions
Apr. 29, 2016
USD ($)
Business Acquisition [Line Items]  
Equity issued $ 4.3
Cash paid for acquisition $ 1.2
Developed technology  
Business Acquisition [Line Items]  
Discount rate 14.00%
Stock paid 15 years
Minimum  
Business Acquisition [Line Items]  
Stock paid 2 years
Maximum  
Business Acquisition [Line Items]  
Stock paid 5 years