Amendment fee.

No definition available.

Name:	prgn_AmendmentFee
Namespace Prefix:	prgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Balloon payment to be received at final maturity date of loan to affiliate.

+ References

No definition available.

+ Details

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

- Definition

Related party interest income.

+ References

No definition available.

+ Details

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

- Definition

Cash inflow from loan pre-payment from affiliate.

+ References

No definition available.

+ Details

Name:	prgn_LoanPrepaymentFromAffiliate
Namespace Prefix:	prgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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).

+ References

No definition available.

+ Details

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

- Definition

Cash inflow from quarterly loan repayment from affiliate.

+ References

No definition available.

+ Details

Name:	prgn_QuarterlyLoanRepaymentFromAffiliate
Namespace Prefix:	prgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of related party shares sold.

+ References

No definition available.

+ Details

Name:	prgn_SaleOfStockNumberOfSharesSoldRelatedParty
Namespace Prefix:	prgn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The reference rate for the variable rate of the loans receivable, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=prgn_AffiliateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=prgn_MarginBeforeAmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=prgn_MarginAfterAmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Transactions with Related Parties - Box Ships Inc. (Details) - Box Ships Inc. - USD ($)	2 Months Ended	4 Months Ended	7 Months Ended		10 Months Ended	12 Months Ended
	Feb. 28, 2013	Apr. 19, 2013	Aug. 05, 2013	Jul. 19, 2013	Oct. 18, 2013	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2014	Apr. 19, 2014	Dec. 31, 2012	May. 27, 2011
Related Party Transaction [Line Items]
Percentage of ownership in Box Ships						0.00%		11.00%
Number of shares sold						3,437,500
Loan to affiliate - balance	$ 13,000,000		$ 6,000,000							$ 14,000,000	$ 30,000,000
Loan to affiliate interest rate basis							LIBOR
Loan pre-payment from affiliate	$ 1,000,000	$ 1,000,000	$ 5,000,000	$ 1,000,000	$ 6,000,000
Quarterly loan repayment from affiliate		$ 1,000,000
Balloon payment - loan to affiliate									$ 9,000,000
Amendment fee							$ 65,000
Interest income related party							$ 439,326
Margin Before Amendment
Related Party Transaction [Line Items]
Margin							4.00%
Margin After Amendment
Related Party Transaction [Line Items]
Margin							5.00%