Basis of Presentation and General Information (Capacity) (Details)	Jun. 30, 2020 m³
CMNL LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	82,000
CJNP LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	82,000
CNML LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	82,000
Comet LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Corsair LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Corvette LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Shanghai LPG Transport LLC (Cougar)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Concorde LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Houston LPG Transport LLC (Cobra)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Sao Paulo LPG Transport LLC (Continental)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Ulsan LPG Transport LLC (Constitution)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Amsterdam LPG Transport LLC (Commodore)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Dubai LPG Transport LLC (Cresques)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Constellation LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Monaco LPG Transport LLC (Cheyenne)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Barcelona LPG Transport LLC (Clermont)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Geneva LPG Transport LLC (Cratis)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Cape Town LPG Transport LLC (Chaparral)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Tokyo LPG Transport LLC (Copernicus)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Commander LPG Transport LLC
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Explorer LPG Transport LLC (Challenger)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000
Dorian Exporter LPG Transport LLC (Caravelle)
Vessel Subsidiaries
Capacity of vessel (in cubic meters)	84,000