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Transactions with Related Parties - Helios LPG Pool LLC (Details)		12 Months Ended
	Apr. 01, 2015 item	Mar. 31, 2026 USD ($) item	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Transactions with Related Parties
Due to related parties			$ 39,339
Helios LPG Pool LLC \| MOL Energia
Transactions with Related Parties
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		31
Dorian LPG owned VLGC vessels operated by the Helios Pool \| item		28
MOL Energia owned VLGC vessels operated by the Helios Pool \| item		2
Vessels time chartered-in by DLPG from 3rd parties operated by Helios Pool		6
Vessels time chartered-in by the Helios Pool		1
Due from related parties		$ 123,400,000	74,400,000
Due to related parties			100,000
Contributed working capital		28,600,000	26,400,000
Related party income - management services for pool vessels		2,500,000	2,500,000	$ 2,500,000
Related party income - expense reimbursements		$ 1,700,000	$ 1,200,000	$ 800,000