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7. Credit Agreements - Primary Lender and Notes Payable (Details Narrative) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Credit Agreements - Primary Lender And Notes Payable Details Narrative    
Collateralizing assets with primary lender $ 644,000PGAI_CollateralizingAssetsWithPrimaryLender $ 644,000PGAI_CollateralizingAssetsWithPrimaryLender
Escrows held by primary lender 5,000PGAI_EscrowsHeldByPrimaryLender 5,000PGAI_EscrowsHeldByPrimaryLender
Land and improvement inventories 639,000us-gaap_LandAndLandImprovements 639,000us-gaap_LandAndLandImprovements
Accrued interest due to the primary lender 408,000PGAI_AccruedInterestDueToPrimaryLender 366,000PGAI_AccruedInterestDueToPrimaryLender
Prime rate 3.25%PGAI_PrimeRate 3.25%PGAI_PrimeRate
Weighted-average interest rate 6.10%us-gaap_DebtWeightedAverageInterestRate 6.10%us-gaap_DebtWeightedAverageInterestRate
Accrued interest on other notes payable $ 3,020,000PGAI_AccruedInterestOnOtherNotesPayable $ 2,958,000PGAI_AccruedInterestOnOtherNotesPayable