Financial Instruments and Fair Value Disclosures - Effect of Derivative Instruments designated as hedging instruments (Table) (Details) (USD $)	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012
Interest rate swaps	$ 403,710	$ (440,917)
Gain / (Loss) Recognized in Accumulated Other Comprehensive Income/ (Loss) - Effective Portion
Interest rate swaps	$ 403,710	$ (440,917)

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income / (loss) during the current period, before any reclassifications to earnings.

No definition available.

Name:	prgn_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNetBeforeReclassificationToEarnings
Namespace Prefix:	prgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration