Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income/(loss)	$ 19,074,335	$ (24,019,086)
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Depreciation	21,537,938	21,303,889
Amortization of operating lease right-of-use assets	6,201,490	6,273,102
Amortization of deferred drydocking costs	4,079,045	3,665,785
Amortization of debt discount and debt issuance costs	3,467,185	3,046,071
Operating lease impairment	0	352,368
Net unrealized loss on fair value of derivatives	30,540,919	814,014
Stock-based compensation expense	1,457,811	1,559,423
Drydocking expenditures	(6,429,334)	(6,576,633)
Changes in operating assets and liabilities:
Accounts payable	8,216,287	(4,523,437)
Accounts receivable	(10,390,156)	(2,921,947)
Accrued interest	(131,202)	(306,303)
Inventories	(4,274,389)	5,719,516
Operating lease liabilities current and noncurrent	(6,664,371)	(6,603,999)
Collateral on derivatives	(33,499,170)	0
Other current and noncurrent assets	(40,507)	(7,078,072)
Other accrued liabilities	(1,779,183)	(7,280,400)
Prepaid expenses	(1,111,900)	1,214,764
Unearned charter hire revenue	330,581	187,760
Net cash provided by/(used in) operating activities	30,585,379	(15,173,185)
Cash flows from investing activities:
Purchase of vessels and vessel improvements	(79,002,764)	(510,029)
Advances for vessel purchases	(5,340,000)	0
Purchase of scrubbers and ballast water systems	(2,385,024)	(22,371,606)
Proceeds from hull and machinery insurance claims	238,315	3,658,924
Purchase of other fixed assets	(13,826)	(40,853)
Net cash used in investing activities	(86,503,299)	(19,263,564)
Cash flows from financing activities:
Net proceeds from issuance of stock	27,372,417	0
Cash received from exercise of stock options	22,224	0
Cash used to settle net share equity awards	(985,686)	(1,161,301)
Equity offerings issuance costs	(291,830)	0
Other financing costs	0	18,539
Net cash provided by financing activities	50,868,477	73,913,522
Net (decrease)/increase in cash, cash equivalents and restricted cash	(5,049,443)	39,476,773
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	83,799,328	98,607,058
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	13,419,869	15,202,876
Accruals for vessel purchases and vessel improvements included in Other accrued liabilities	229,185	0
Accruals for scrubbers and ballast water treatment systems included in Accounts payable and Other accrued liabilities	3,345,643	8,507,683
Accrual for issuance costs for ATM Offering included in Other accrued liabilities	88,500	0
Accruals for debt issuance costs included in Other accrued liabilities	500,000	200,000
New Ultraco Debt Facility
Cash flows from financing activities:
Proceeds from debt	11,000,000	22,550,000
Debt issuance costs paid to lenders	(181,500)	(381,471)
New Ultraco Debt Facility | Term Loan
Cash flows from financing activities:
Repayments of long-term debt	(15,897,148)	(13,112,245)
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	(30,000,000)	0
Norwegian Bond Debt Facility
Cash flows from financing activities:
Repayments of long-term debt	(4,000,000)	(4,000,000)
Super Senior Facility
Cash flows from financing activities:
Proceeds from debt	0	15,000,000
Super Senior Facility | Revolver Loan
Cash flows from financing activities:
Repayments of long-term debt	(15,000,000)	0
Holdco Revolving Facility
Cash flows from financing activities:
Debt issuance costs paid to lenders	(170,000)	0
Holdco Revolving Facility | Revolver Loan
Cash flows from financing activities:
Proceeds from debt	$ 24,000,000	$ 0