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Discontinued Operations - Operating Results of PCT Segment (Details) - USD ($)
3 Months Ended 9 Months Ended
May 18, 2017
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Income from discontinued operations   $ 0 $ 0 $ 0 $ 37,329,963
PCT Segment [Member] | Discontinued Operations [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Revenue         16,039,000
Cost of revenues         (15,321,000)
Research and development         (257,000)
Selling, general, and administrative         (3,251,000)
Other expense         (16,000)
Provision for income taxes         (11,608,000)
Gain on sale of PCT Segment $ 51,744,000       51,744,000
Income from discontinued operations         $ 37,330,000