Vessels - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) vessel	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($) scrubber vessel
Property, Plant and Equipment [Line Items]
Number of vessels | vessel	50
Amount recorded in balance sheet	$ 18,087,278	$ 11,244,778
Scrubber Systems
Property, Plant and Equipment [Line Items]
Number of vessels | vessel	36
Projected project costs			$ 2,300,000
System costs	$ 83,600,000
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			40
Projected project costs			$ 500,000
Scrubbers and BWTS reclassified	2,800,000
Amount recorded in balance sheet	1,600,000
Vessels and Vessel Improvements
Property, Plant and Equipment [Line Items]
Number of vessels | vessel			13
Scrubbers and BWTS reclassified	32,860,967
Amount recorded in balance sheet	$ 5,500,000