Other Long-Term Liabilities (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Other Long-Term Liabilities [Abstract]
Contractual and statutory severance liabilities	$ 639	$ 614

Acquired Long-Term Contractual And Statutory Severance Liabilities

No definition available.

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