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Inventories (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Schedule of inventories    
Raw materials, Gross $ 10,207,942us-gaap_InventoryRawMaterials $ 6,142,748us-gaap_InventoryRawMaterials
Finished goods 723,669us-gaap_InventoryFinishedGoods 996,851us-gaap_InventoryFinishedGoods
Totals 10,931,611us-gaap_InventoryNet 7,139,599us-gaap_InventoryNet
Recycled paper board [Member]    
Schedule of inventories    
Raw materials, Gross 8,202,491us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= onp_RecycledPaperBoardMember
4,338,069us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= onp_RecycledPaperBoardMember
Recycled white scrap paper [Member]    
Schedule of inventories    
Raw materials, Gross 1,446,171us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= onp_RecycledWhiteScrapPaperMember
1,212,588us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= onp_RecycledWhiteScrapPaperMember
Coal [Member]    
Schedule of inventories    
Raw materials, Gross 472,949us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryCoalMember
497,038us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryCoalMember
Base paper and other raw materials [Member]    
Schedule of inventories    
Raw materials, Gross $ 86,331us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= onp_BasePaperAndOtherRawMaterialsMember
$ 95,053us-gaap_InventoryRawMaterials
/ us-gaap_PublicUtilitiesInventoryAxis
= onp_BasePaperAndOtherRawMaterialsMember