Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (24,019,086)	$ (5,962,673)
Adjustments to reconcile net loss to net cash (used in)/provided by operating activities:
Depreciation	21,303,889	16,434,359
Amortization of operating lease right-of-use assets	6,273,102	6,242,947
Amortization of deferred drydocking costs	3,665,785	2,734,071
Amortization of debt discount and debt issuance costs	3,046,071	1,128,929
Loss on debt extinguishment	0	2,268,452
Gain on sale of vessels	0	(5,073,349)
Operating lease impairment	352,368	0
Net unrealized loss/(gain) on fair value of derivatives	814,014	(1,951,420)
Stock-based compensation expense	1,559,423	2,672,679
Drydocking expenditures	(6,576,633)	(4,506,257)
Changes in operating assets and liabilities:
Accounts payable	(4,523,437)	(4,411,836)
Accounts receivable	(2,921,947)	747,545
Accrued interest	(306,303)	1,023,820
Inventories	5,719,516	3,143,326
Operating lease liabilities short and long-term	(6,603,999)	(6,616,844)
Derivative asset, other current and non-current assets	(7,078,072)	885,451
Other accrued liabilities	(7,280,400)	3,540,176
Prepaid expenses	1,214,764	657,760
Unearned revenue	187,760	(4,496,185)
Net cash (used in)/provided by operating activities	(15,173,185)	8,460,951
Cash flows from investing activities:
Purchase of vessel and vessel improvements	(510,029)	(18,477,740)
Purchase of scrubbers and ballast water systems	(22,371,606)	(23,893,065)
Proceeds from hull and machinery insurance claims	3,658,924	1,301,546
Proceeds from sale of vessels	0	22,631,367
Purchase of other fixed assets	(40,853)	(200,959)
Net cash used in investing activities	(19,263,564)	(18,638,851)
Cash flows from financing activities:
Cash used to settle net share equity awards	(1,161,301)	(877,697)
Other financing costs	18,539	(280,237)
Net cash provided by/(used in) financing activities	73,913,522	(2,522,855)
Net increase/(decrease) in cash, cash equivalents and Restricted cash	39,476,773	(12,700,755)
Cash, cash equivalents and Restricted cash at beginning of period	59,130,285	78,163,638
Cash, cash equivalents and Restricted cash at end of period	98,607,058	65,462,883
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	15,202,876	11,028,514
Accruals for scrubbers and ballast water treatment systems included in Accounts payable and Other accrued liabilities	8,507,683	8,976,160
Accruals for debt issuance costs included in Other accrued liabilities	200,000	0
New First Lien Facility
Cash flows from financing activities:
Repayment of revolver loan under New First Lien Facility	0	(5,000,000)
Proceeds from debt	0	5,000,000
Repayments of long-term debt	0	(60,000,000)
Ultraco Debt Facility
Cash flows from financing activities:
Proceeds from debt	22,550,000	153,440,000
Repayments of long-term debt	0	(82,600,000)
Norwegian Bond Debt Facility
Cash flows from financing activities:
Repayments of long-term debt	(4,000,000)	(4,000,000)
New Ultraco Debt Facility
Cash flows from financing activities:
Proceeds from debt	55,000,000	0
Repayments of long-term debt	(13,112,245)	(5,048,671)
Debt issuance costs paid to lenders on New Ultraco Debt Facility	(381,471)	(3,156,250)
Convertible Bond Debt
Cash flows from financing activities:
Proceeds from debt	$ 15,000,000	$ 0