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Related Party Transactions - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended
Feb. 28, 2015
Mar. 31, 2014
Mar. 31, 2015
Related Party Transaction [Line Items]      
Consulting Fees $ 28,500posc_ConsultingFees    
Chief Executive Officer      
Related Party Transaction [Line Items]      
Repayments of Related Party Debt   57,500us-gaap_RepaymentsOfRelatedPartyDebt
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Consulting Fees   37,000posc_ConsultingFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Chief Financial Officer      
Related Party Transaction [Line Items]      
Repayments of Related Party Debt   $ 107,500us-gaap_RepaymentsOfRelatedPartyDebt
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefFinancialOfficerMember
$ 36,250us-gaap_RepaymentsOfRelatedPartyDebt
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_ChiefFinancialOfficerMember