Vessels - Additional Information (Details)	6 Months Ended
	Jun. 30, 2020 USD ($) vessel	Jun. 30, 2019 USD ($)	Sep. 30, 2018 USD ($) vessel scrubber
Property, Plant and Equipment [Line Items]
Number of vessels | vessel	50
Amount recorded in balance sheet	$ 22,371,606	$ 23,893,065
Scrubber Systems
Property, Plant and Equipment [Line Items]
Number of vessels | vessel	37
Projected project costs			$ 2,400,000
Amount recorded in balance sheet	$ 88,100,000
Scrubber Systems | Maximum
Property, Plant and Equipment [Line Items]
Number of scrubbers | scrubber			37
Ballast Water Treatment System
Property, Plant and Equipment [Line Items]
Number of vessels | vessel			39
Projected project costs			$ 500,000
Scrubbers and BWTS reclassified	2,800,000
Vessels and Vessel Improvements
Property, Plant and Equipment [Line Items]
Number of vessels | vessel			15
Amount recorded in balance sheet	6,700,000
Scrubbers and BWTS reclassified	$ 38,587,819