Earnings/(Loss) Per Share (EPS) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Numerator:
Net income/(loss)	$ (3,465,995)	$ 1,670,415	$ (11,915,136)	$ (6,689,970)	$ 1,955,240	$ 5,039,624	$ (7,145,558)	$ (1,291,121)	$ (20,400,686)	$ (1,441,815)	$ 129,688,382
Denominator:
Basic weighted average number of common shares outstanding (in shares)									54,039,886	54,079,139	56,657,570
Effect of dilutive restricted stock (in shares)											49,524
Diluted weighted average number of common shares outstanding (in shares)									54,039,886	54,079,139	56,707,094
EPS:
Earnings/(loss) per common share – basic (in dollars per share)									$ (0.38)	$ (0.03)	$ 2.29
Earnings/(loss) per common share – diluted (in dollars per share)									$ (0.38)	$ (0.03)	$ 2.29
Restricted stock awards
EPS:
Number of shares excluded from the calculation of diluted EPS									918,344	1,114,625	655,000