2.4.0.81061 - Disclosure - Property and Equipment - Additional Information (Detail)truefalsefalse1false USDfalsefalse$eol_PE9760----1210-K0011_STD_0_20120831_0http://www.sec.gov/CIK0000739608instant2012-08-31T00:00:000001-01-01T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$eol_PE9760----1210-K0011_STD_0_20120812_0http://www.sec.gov/CIK0000739608instant2012-08-12T00:00:000001-01-01T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1penx_PropertyPlantAndEquipmentUsefulLifeAndValuesAbstractpenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Property Plant And Equipment Useful Life And Values [Abstract]2false 2us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse0.50.5USD$falsetruefalse2truefalsefalse1.01.0USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 false2Equipment under capital leases3false 2us-gaap_ConstructionPayableCurrentus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse0.80.8USD$falsetruefalse2truefalsefalse1.11.1USD$falsetruefalsexbrli:monetaryItemTypemonetaryCarrying value as of the balance sheet date of obligations incurred and payable for the acquisition of merchandise, materials, supplies and services pertaining to construction projects such as a housing development or factory expansion not classified as trade payables. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 false2Payables related to property, plant and equipmentfalseProperty and Equipment - Additional Information (Detail) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.penx.com/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformation23