CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Interest received-related party	$ 12,000us-gaap_ProceedsFromInterestReceived	$ 16,000us-gaap_ProceedsFromInterestReceived
Other income	4,000us-gaap_OtherIncome	0us-gaap_OtherIncome
Cash flows from operating activities	(16,000)us-gaap_ProceedsFromOperatingActivities	(16,000)us-gaap_ProceedsFromOperatingActivities
Cash expended for operations:
Taxes and assessments	9,000PGAI_TaxesAndAssessments	10,000PGAI_TaxesAndAssessments
Consulting and accounting-related party	39,000PGAI_ConsultingAndAccounting	39,000PGAI_ConsultingAndAccounting
Legal and professional	17,000us-gaap_LegalFees	9,000us-gaap_LegalFees
General and administrative	59,000PGAI_GeneralAndAdministrativePayments	61,000PGAI_GeneralAndAdministrativePayments
Cash expended for operations	124,000us-gaap_PaymentsForOperatingActivities	119,000us-gaap_PaymentsForOperatingActivities
Net cash flows used in operating activities	(108,000)	(103,000)
Cash flows from investing activities:
Net repayments of notes receivable-related party	108,000us-gaap_RepaymentsOfRelatedPartyDebt	103,000us-gaap_RepaymentsOfRelatedPartyDebt
Net cash flows provided by investing activities	108,000	103,000
Net change in cash and cash equivalents
Cash and cash equivalents at beginning of year	1,000us-gaap_Cash	1,000us-gaap_Cash
Cash and cash equivalents at end of year	1,000us-gaap_Cash	1,000us-gaap_Cash
Reconciliation of net loss to net cash used in operating activities:
Net loss	(6,512,000)us-gaap_NetIncomeLoss	(6,904,000)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activites:
Forgiveness of debt and interest	(1,313,000)
(Increase) decrease in assets:
Deposit with Trustee of 6.5% debentures	89,000PGAI_DepositWithTrusteeDebentures
Deferred charges		1,000
Increase (decrease) in liabilities:
Accounts payable and accrued expenses	10,000	8,000
Accrued interest	1,296,000	1,277,000
Accrued interest-related party	6,322,000	5,515,000
Net cash flow used in operating activities	$ (108,000)	$ (103,000)

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