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Discontinued Operations - Operating Results of PCT Segment (Details) - USD ($)
3 Months Ended 6 Months Ended
May 18, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Income from discontinued operations   $ 0 $ 40,487,438 $ 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     5,729,000   16,039,000
Cost of revenues     (5,268,000)   (15,321,000)
Research and development     (143,000)   (257,000)
Selling, general, and administrative     (8,000)   (3,251,000)
Other expense     (8,000)   (16,000)
Provision for income taxes     (11,559,000)   (11,608,000)
Gain on sale of PCT Segment $ 51,744,000   51,744,000   51,744,000
Income from discontinued operations     $ 40,487,000   $ 37,330,000