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Concentration of Credit Risk (Details Narrative) (10-K)	Dec. 31, 2017 USD ($) Integer
Number of commercial banks has companies operating cash | Integer	2
Commercial Bank One [Member]
Cash FDIC insured amount	$ 2,900,393
Commercial Bank Two [Member]
Cash FDIC insured amount	$ 2,184

X

- Definition

Number of commercial banks has companies operating cash.

+ References

No definition available.

+ Details

Name:	PCSA_NumberOfCommercialBanks
Namespace Prefix:	PCSA_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

+ Details

Name:	us-gaap_CashFDICInsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis=PCSA_CommercialBankTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: