Transactions with Related Parties (Details)		3 Months Ended		9 Months Ended
	Apr. 01, 2014 item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)
Transactions with Related Parties
Due from related parties - current		$ 47,487,533		$ 47,487,533		$ 56,191,375
Due to related parties		360,682		$ 360,682		117,803
Number of time chartered-in VLGC | item				2
Manager
Transactions with Related Parties
Due from related parties - current		$ 1,000,000.0		$ 1,000,000.0		1,000,000.0
Mr. John Hadjipateras
Transactions with Related Parties
Ownership interest (as a percent)		100.00%		100.00%
Helios LPG Pool LLC
Transactions with Related Parties
Due from related parties		$ 67,000,000.0		$ 67,000,000.0		78,100,000
Due from related parties - current		2,200,000		2,200,000		1,100,000
Due to related parties						100,000
Due to related party		300,000		$ 300,000
Ownership interest (as a percent)	50.00%
Number of members | item	2
Number of vessels that are operating under pooling agreement | item				24
Number of time chartered-in VLGC | item				2
Number of Company vessels that are operating under pooling agreement | item				21
Working capital contributed		23,100,000		$ 23,100,000		$ 24,200,000
Helios LPG Pool LLC | Phoenix
Transactions with Related Parties
Number of third party vessels that are operating under pooling agreement | item				3
Other income-related party | Manager
Transactions with Related Parties
Related party income for chartering and operational services				$ 100,000	$ 100,000
Other income-related party | Manager | Maximum
Transactions with Related Parties
Related party income for chartering and operational services		100,000	$ 100,000
Other income-related party | Helios LPG Pool LLC
Transactions with Related Parties
Related party income for chartering and operational services		500,000	500,000	1,600,000	1,500,000
Other revenues, net
Transactions with Related Parties
Fixed reimbursement of expense from Helios		$ 400,000	$ 900,000	$ 1,900,000	$ 2,900,000