Consolidated Statements of Changes in Shareholders' Equity ( Parenthetical )	12 Months Ended
Dec. 31, 2016 $ / shares
Consolidated Statement of Stockholders' Equity [Abstract]
Issuance of common stock for cash price per share	$ 1.00

Cash per share or per unit amount of equity securities issued.

No definition available.

Name:	prhr_IssuanceOfCommonSharesForCashPricePerShare
Namespace Prefix:	prhr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration