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9. SEGMENT REPORTING (Details - Long lived assets) (USD $)
Jan. 31, 2015
Apr. 30, 2014
Long-lived assets $ 8,958,000us-gaap_PropertyPlantAndEquipmentNet $ 2,447,000us-gaap_PropertyPlantAndEquipmentNet
Contract Manufacturing Services [Member]    
Long-lived assets 6,701,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= pphm_ContractManufacturingServicesMember		 1,956,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= pphm_ContractManufacturingServicesMember
Products in research and development [Member]    
Long-lived assets $ 2,257,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= pphm_ProductsInResearchAndDevelopmentMember		 $ 491,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementBusinessSegmentsAxis
= pphm_ProductsInResearchAndDevelopmentMember