Vessels, Net (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Vessels, Net
Vessels, net	$ 1,437,658,833	$ 1,478,520,314
Vessels
Vessels, Net
Vessels, net	1,437,658,833	1,478,520,314	$ 1,539,111,833
Cost
Balance at the beginning of the period	1,732,993,810	1,728,987,980
Other additions	24,291,423	4,005,830
Balance at the end of the period	1,757,285,233	1,732,993,810
Accumulated depreciation
Balance at the beginning of the period	(254,473,496)	(189,876,147)
Impairment	0	0
Depreciation	(65,152,904)	(64,597,349)
Balance at the end of the period	(319,626,400)	(254,473,496)
Mortgaged VLGC vessels, carrying value	$ 1,437,700,000	$ 1,478,500,000