Basis of Presentation and General Information (General) (Details)	6 Months Ended
	Sep. 30, 2021 item
Basis of Presentation and General Information
Total number of vessels	22
Number of fuel-efficient ECO-design VLGCs having 84,000 cbm	19
Number of VLGCs having 82,000 cbm	2
Number of time chartered-in VLGC	1
The number of vessels that have exhaust gas cleaning systems	12