Revenue from Contracts with Customers (Summary of Current Balances of Contract Balances) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Jul. 01, 2018	Jun. 30, 2018
Revenue From Contract With Customer [Abstract]
Unbilled receivables	$ 6,634	$ 1,864
Deferred revenue	(6,155)	(6,715)	$ (8,691)
Net Unbilled receivables / (Deferred revenue)	479	$ (4,851)
Unbilled receivables, Increase / (Decrease)	4,770
Deferred revenue, Increase / (Decrease)	560
Net Increase / (Decrease), Unbilled receivables / (Deferred revenue)	$ 5,330

Contract with customer increase decrease in deferred revenue.

No definition available.

Name:	prcp_ContractWithCustomerIncreaseDecreaseInDeferredRevenue
Namespace Prefix:	prcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contract with customer increase decrease in unbilled receivables.

+ References

No definition available.

+ Details

Name:	prcp_ContractWithCustomerIncreaseDecreaseInUnbilledReceivables
Namespace Prefix:	prcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contract with customer, liability, net.

+ References

No definition available.

+ Details

Name:	prcp_ContractWithCustomerLiabilityNet
Namespace Prefix:	prcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contract with customer, net increase (decrease) in unbilled receivables or deferred revenue.

+ References

No definition available.

+ Details

Name:	prcp_ContractWithCustomerNetIncreaseDecreaseInUnbilledReceivablesOrDeferredRevenue
Namespace Prefix:	prcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044

+ Details

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

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration