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Inventories (Details) (USD $)
Mar. 31, 2015
Mar. 31, 2014
Inventories    
Inventories $ 3,375,759us-gaap_InventoryNet $ 1,058,329us-gaap_InventoryNet
Bunkers    
Inventories    
Inventories 2,446,424us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_BunkersMember		 596,768us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_BunkersMember
Lubricants    
Inventories    
Inventories 737,502us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_LubricantsMember		 358,381us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_LubricantsMember
Victualing    
Inventories    
Inventories 132,017us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_VictualingMember		 83,840us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_VictualingMember
Bonded stores    
Inventories    
Inventories 35,399us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_BondedStoresMember		 15,354us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_BondedStoresMember
Communication cards    
Inventories    
Inventories $ 24,417us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_CommunicationCardsMember		 $ 3,986us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= lpg_CommunicationCardsMember