Long-Term Debt - Additional Information (Details) - USD ($)		12 Months Ended
	Mar. 11, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Sep. 16, 2016	Mar. 08, 2013
Debt Instrument [Line Items]
Interest expense		$ 6,800,000	$ 5,700,000	$ 2,200,000
Interest paid		6,800,000	4,700,000	2,100,000
Interest capitalized		0	0	11,000
Loan Cost Amortization		828,075	365,860	256,332
Amortization of Discount on Convertible Debt		1,120,859	852,368	$ 0
Write off of unamortized loan costs		$ 367,000
4.50% Convertible Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Write off of unamortized loan costs	$ 6,100,000
BOA Mortgage Note Payable [Member] | Mortgage Notes Payable [Member]
Debt Instrument [Line Items]
Mortgage Notes Payable			$ 23,100,000		$ 23,100,000	$ 23,100,000