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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) (USD $)
9 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2015
Apr. 30, 2014
Mar. 12, 2015
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2014
Accounts Receivable [Member] | Three Customers [Member]            
Concentration risk percentage 96.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= pphm_ThreeCustomersMember
         
Accounts Receivable [Member] | Two Customers [Member]            
Concentration risk percentage   99.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= pphm_TwoCustomersMember
       
Preferred Stock [Member] | Series E Preferred Stock [Member]            
Gross proceeds from issuance of equity 10,121,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_ShareholdersEquityClassAxis
= us-gaap_SeriesEPreferredStockMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
         
Common Stock [Member]            
Gross proceeds from issuance of equity 7,397,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
  $ 6,204,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Options and Warrants [Member]            
Antidilutive shares excluded from calculation of weighted average diluted shares outstanding 8,774,097us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= pphm_OptionsAndWarrantsMember
    8,842,337us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= pphm_OptionsAndWarrantsMember
5,547,131us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= pphm_OptionsAndWarrantsMember
5,865,858us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= pphm_OptionsAndWarrantsMember
Series E Preferred Stock [Member]            
Antidilutive shares excluded from calculation of weighted average diluted shares outstanding 9,321,584us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_SeriesEPreferredStockMember
    9,912,502us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_SeriesEPreferredStockMember