Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 329,800,000
Current portion of long-term debt	(11,875,142)		$ (4,000,000)
Total long-term debt	309,597,693		313,683,677
Norwegian Bond Debt Facility
Debt Instrument [Line Items]
Long-term debt	200,000,000
Total long-term debt	190,160,155		189,950,329
New First Lien Facility
Debt Instrument [Line Items]
Long-term debt	60,000,000
Total long-term debt	54,436,463		63,758,185
Ultraco Debt Facility
Debt Instrument [Line Items]
Long-term debt	69,800,000
Total long-term debt	65,001,075		59,975,162
Senior Subordinated Notes | Norwegian Bond Debt Facility
Debt Instrument [Line Items]
Long-term debt	200,000,000		200,000,000
Debt discount and debt issuance costs	(5,839,845)		(6,049,670)
Current portion of long-term debt	(4,000,000)		(4,000,000)
Long-term Debt	190,160,155		189,950,330
Line of Credit | New First Lien Facility
Debt Instrument [Line Items]
Long-term debt	60,000,000		65,000,000
Debt discount and debt issuance costs	(1,263,537)		(1,241,815)
Current portion of long-term debt	(4,300,000)		0
Long-term Debt	54,436,463		63,758,185
Term Loan
Debt Instrument [Line Items]
Repayments of lines of credit	0	$ 2,895,250
Term Loan | Ultraco Debt Facility
Debt Instrument [Line Items]
Long-term debt	69,800,000		61,200,000
Debt discount and debt issuance costs	(1,223,783)		(1,224,838)
Current portion of long-term debt	(3,575,142)		0
Long-term Debt	65,001,075		$ 59,975,162
Revolving Credit Facility | Eagle Shipping LLC | Line of Credit | New First Lien Facility
Debt Instrument [Line Items]
Repayments of lines of credit	$ 5,000,000