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Per Share Data - Earnings per Share Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net (loss)/income for basic earnings per share	$ (1,205,827)	$ 388,050,413	$ (2,738,542)	$ 369,416,894
Gain (loss) from change in fair value of warrant liability	981,923	(2,328,674)	4,774,711	(5,271,503)
Net (loss)/income, adjusted for change in fair value of warrants for diluted earnings per share	$ (2,187,750)	$ 390,379,087	$ (7,513,253)	$ 374,688,397
Weighted average shares outstanding: basic	81,064,927	80,023,044	80,988,813	79,650,373
Effect of potential common shares	1,116,931	2,906,432	1,159,520	3,093,854
Weighted average shares outstanding: diluted	82,181,858	82,929,476	82,148,333	82,744,227
(Loss)/income per share: basic	$ (0.01)	$ 4.85	$ (0.03)	$ 4.64
(Loss)/income per share: diluted	$ (0.03)	$ 4.71	$ (0.09)	$ 4.53

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