Transactions with Related Parties - Helios LPG Pool LLC (Details)		3 Months Ended		9 Months Ended
	Apr. 01, 2015 item	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($)	Mar. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Due to related parties		$ 159,748		$ 159,748		$ 168,793
Other income - related parties		645,454	$ 638,055	1,946,837	$ 1,793,595
Expense reimbursement income		730,536	792,949	$ 1,854,712	1,389,231
Helios LPG Pool LLC | MOL Energia
Related Party Transaction [Line Items]
Ownership interest (as a percent)	50.00%
Board members from each joint venture needed to approve operational activities | item	2
Total VLGC vessels operated by the Helios Pool | item				27
Dorian LPG owned VLGC vessels operated by the Helios Pool | item				23
MOL Energia owned VLGC vessels operated by the Helios Pool | item				4
Unrelated party time chartered-in VLGC vessels operated by the Helios Pool | item				4
Due from related parties		110,300,000		$ 110,300,000		93,700,000
Due to related parties		100,000		100,000		200,000
Working capital contributed		25,300,000		25,300,000		22,000,000.0
Working capital contributed, current						$ 1,100,000
Other income - related parties		600,000	600,000	1,800,000	1,600,000
Expense reimbursement income		$ 400,000	$ 600,000	$ 800,000	$ 1,100,000