Transactions with Related Parties - Helios LPG Pool LLC (Details)		12 Months Ended
	Apr. 01, 2015 item	Mar. 31, 2025 USD ($) item	Mar. 31, 2024 USD ($)
Related Party Transaction [Line Items]
Due to related parties | $		$ 39,339	$ 7,283
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		29
Dorian LPG owned VLGC vessels operated by the Helios Pool | item		25
MOL Energia owned VLGC vessels operated by the Helios Pool | item		3
Vessels time chartered-in by DLPG from 3rd parties operated by Helios Pool		4
Vessels time chartered-in by the Helios Pool		1
Due from related parties | $		$ 74,400,000	77,600,000
Due to related parties | $		100,000	100,000
Contributed working capital | $		$ 26,400,000	$ 25,300,000