Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss)/income	$ (3,527,759)	$ 29,483
Adjustments to reconcile net (loss)/income to net cash provided by operating activities:
Depreciation	10,566,534	8,168,411
Amortization of operating lease right-of-use assets	3,225,018	3,271,111
Amortization of deferred drydocking costs	1,899,949	1,238,698
Amortization of debt discount and debt issuance costs	1,503,866	503,716
Loss on debt extinguishment	0	2,268,452
Gain on sale of vessels	0	(4,106,547)
Net unrealized gain on fair value of derivatives	(7,157,801)	(2,958,154)
Stock-based compensation expense	836,200	1,445,469
Drydocking expenditures	(5,176,872)	(2,527,553)
Changes in operating assets and liabilities:
Accounts payable	(3,427,047)	1,467,508
Accounts receivable	(2,020,325)	810,103
Accrued interest	2,476,203	5,255,356
Inventories	463,444	2,999,999
Operating lease liabilities short and long-term	(3,390,466)	(3,643,179)
Derivative asset, other current and non-current assets	(4,092,628)	1,084,257
Other accrued liabilities and other non-current liabilities	(3,755,411)	(2,306,786)
Prepaid expenses	612,182	694,789
Unearned revenue	(1,459,899)	(1,753,257)
Net cash (used in)/provided by operating activities	(12,424,812)	11,941,876
Cash flows from investing activities:
Purchase of vessel and vessel improvements	(466,556)	(18,465,609)
Purchase of scrubbers and ballast water systems	(18,087,278)	(11,244,778)
Proceeds from hull and machinery insurance claims	3,569,901	0
Proceeds from sale of vessels	0	12,820,557
Purchase of other fixed assets	(37,659)	(23,924)
Net cash used in investing activities	(15,021,592)	(16,913,754)
Cash flows from financing activities:
Cash used to settle net share equity awards	(1,161,301)	(877,161)
Other financing costs	13,819	0
Net cash provided by financing activities	40,538,847	6,806,589
Net increase in cash, cash equivalents and Restricted cash	13,092,443	1,834,711
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	72,222,728	79,998,349
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	5,211,746	901,516
Accruals for scrubbers and ballast water treatment systems included in Accounts payable and Other accrued liabilities	8,669,169	4,749,057
Accruals for debt issuance costs included in Other accrued liabilities	0	300,000
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	0	153,440,000
Repayments of long-term debt	0	(82,600,000)
New Ultraco Debt Facility
Cash flows from financing activities:
Proceeds from debt	45,000,000	0
Repayments of long-term debt	(5,813,671)	0
Debt issuance costs paid to lenders on New Ultraco Debt Facility	0	(3,156,250)
Convertible Bond Debt
Cash flows from financing activities:
Proceeds from debt	$ 2,500,000	$ 0