Subsequent Events (Details) (USD $)	7 Months Ended
Aug. 05, 2013 Box Ships Inc.	Jul. 31, 2013 M/V Coral Seas and M/V Deep Seas
Subsequent Event [Line Items]
Cash received from early termination of contract		$ 2,250,000
Loan pre-payment from affiliate	5,000,000
Loan to affiliate - balance	$ 6,000,000

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership due within or after 1 year (or one business cycle).

No definition available.

Name:	prgn_LoanToAffiliateBalance
Namespace Prefix:	prgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant