Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt		$ 329,800,000
Current portion of long-term debt		(19,812,713)		$ (4,000,000)
Total long-term debt		301,998,865		313,683,676
Norwegian Bond Debt Facility
Debt Instrument [Line Items]
Long-term debt		200,000,000
Total long-term debt		186,381,482		189,950,329
New First Lien Facility
Debt Instrument [Line Items]
Long-term debt		60,000,000
Total long-term debt		52,353,586		63,758,185
Ultraco Debt Facility
Debt Instrument [Line Items]
Long-term debt		69,800,000
Total long-term debt		63,263,797		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		(5,618,518)		(6,049,671)
Current portion of long-term debt		(8,000,000)		(4,000,000)
Long-term Debt		186,381,482		189,950,329
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		(1,196,414)		(1,241,815)
Current portion of long-term debt		(6,450,000)		0
Long-term Debt		52,353,586		63,758,185
Line of Credit | New First Lien Facility | Revolving Credit Facility | Eagle Shipping LLC
Debt Instrument [Line Items]
Repayments of lines of credit	$ 5,000,000
Term Loan
Debt Instrument [Line Items]
Repayments of lines of credit		0	$ 5,293,250
Term Loan | Ultraco Debt Facility
Debt Instrument [Line Items]
Long-term debt		69,800,000		61,200,000
Debt discount and debt issuance costs		(1,173,490)		(1,224,838)
Current portion of long-term debt		(5,362,713)		0
Long-term Debt		$ 63,263,797		$ 59,975,162