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Discontinued Operations PCT Segment Narrative (Details) - PCT Segment [Member] - Discontinued Operations [Member] - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended
May 18, 2017
Jul. 31, 2017
Mar. 31, 2017
Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Subsidiary, Ownership Interest by Parent 80.10%      
Transaction Costs Related to Sale $ 6,919      
Payments to Employees       $ 4,300
Retention Payments, First Retention Payment, Percent       50.00%
Retention Payments, Second Retention Payment, Percent       50.00%
Hitachi Chemical Co., LTD [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Purchase Agreement, Additional Consideration 4,400      
Purchase Agreement, Potential Future Milestone Payment 5,000      
Cumulative Revenue Threshold for Receiving Milestone Payment 125,000      
Proceeds From Licensing Agreements, Initial Payment     $ 5,000  
Proceeds From Licensing Agreements, Closing Payments 65,000      
Proceeds From Licensing Agreements, Escrow Amount 5,000      
PCT Allendale, LLC [Member] | Hitachi Chemical Co., LTD [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Purchase Agreement, Aggregate Purchase Price $ 75,000      
Subsequent Event [Member] | Hitachi Chemical Co., LTD [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds From Licensing Agreements, Closing Payments   $ 4,400