Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income/(loss)	$ 97,415,605	$ (35,178,372)
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation	32,951,082	32,085,266
Amortization of operating lease right-of-use assets	10,535,980	9,388,238
Amortization of deferred drydocking costs	6,236,262	5,502,211
Amortization of debt discount and debt issuance costs	5,442,978	4,654,871
Loss on debt extinguishment	99,033	0
(Gain)/loss on sale of vessel	(3,962,093)	389,207
Operating lease impairment	0	352,368
Net unrealized loss on fair value of derivatives	24,193,472	2,677,003
Stock-based compensation expense	2,235,279	2,300,444
Drydocking expenditures	(10,736,908)	(10,830,172)
Changes in operating assets and liabilities:
Accounts payable	4,638,944	(4,135,537)
Accounts receivable	(10,645,335)	2,956,653
Accrued interest	2,385,397	1,850,383
Inventories	(5,467,068)	4,130,347
Operating lease liabilities current and noncurrent	(11,303,671)	(9,915,541)
Collateral on derivatives	(31,369,664)	0
Fair value of derivatives, other current and noncurrent assets	(1,149,973)	(5,905,400)
Other accrued liabilities	1,897,863	(5,872,683)
Prepaid expenses	(1,455,586)	1,906,748
Unearned charter hire revenue	8,973,352	1,296,976
Net cash provided by/(used in) operating activities	120,914,949	(2,346,990)
Cash flows from investing activities:
Purchase of vessels and vessel improvements	(109,384,938)	(605,660)
Advance for vessel purchase	(2,200,000)	0
Purchase of scrubbers and ballast water systems	(4,557,463)	(25,224,068)
Proceeds from hull and machinery insurance claims	245,000	3,749,779
Proceeds from sale of vessel	9,159,077	4,594,081
Purchase of other fixed assets	(29,127)	(43,659)
Net cash used in investing activities	(106,767,451)	(17,529,527)
Cash flows from financing activities:
Net proceeds from issuance of stock	27,242,417	0
Cash received from exercise of stock options	55,578	0
Cash used to settle net share equity awards	(985,686)	(1,161,301)
Equity offerings issuance costs	(291,830)	0
Cash used to settle fractional shares	0	(12,513)
Cash paid to bondholder upon conversion of Convertible Bond Debt	(23)	0
Other financing costs	0	(44,104)
Net cash provided by financing activities	22,648,099	46,027,292
Net increase in cash, cash equivalents and restricted cash	36,795,597	26,150,775
Cash, cash equivalents and restricted cash at beginning of period	88,848,771	59,130,285
Cash, cash equivalents and restricted cash at end of period	125,644,368	85,281,060
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	17,462,440	20,377,697
Accruals for vessel purchases and vessel improvements included in Other accrued liabilities	499,578	0
Accruals for scrubbers and ballast water treatment systems included in Accounts payable and Other accrued liabilities	3,258,545	5,915,948
Accrual for issuance costs for ATM Offering included in Other accrued liabilities	104,080	0
Accruals for debt issuance costs included in Accounts payable and Other accrued liabilities	508,768	200,000
New Ultraco Debt Facility
Cash flows from financing activities:
Debt issuance costs paid to lenders	(328,241)	(381,471)
New Ultraco Debt Facility | Term Loan
Cash flows from financing activities:
Repayments of long-term debt	(24,258,223)	(20,923,319)
New Ultraco Debt Facility | Revolver Loan
Cash flows from financing activities:
Proceeds from debt	55,000,000	55,000,000
Repayments of long-term debt	(55,000,000)	(20,000,000)
New Ultraco Debt Facility | Secured Debt | Line of Credit
Cash flows from financing activities:
Proceeds from debt	16,500,000	22,550,000
Norwegian Bond Debt Facility
Cash flows from financing activities:
Repayments of long-term debt	(4,000,000)	(4,000,000)
Super Senior Facility | Line of Credit
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Loss on debt extinguishment	100,000
Super Senior Facility | Revolver Loan
Cash flows from financing activities:
Proceeds from debt	0	15,000,000
Repayments of long-term debt	(15,000,000)	0
Holdco Revolving Facility
Cash flows from financing activities:
Debt issuance costs paid to lenders	(285,893)	0
Holdco Revolving Facility | Revolver Loan
Cash flows from financing activities:
Proceeds from debt	$ 24,000,000	$ 0