Business Combination (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		4 Months Ended	9 Months Ended				9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Feb. 15, 2013	Sep. 30, 2012	Jun. 30, 2013 Business Acquisition Acro Member [Member]	Feb. 08, 2013 Business Acquisition Acro Member [Member]
BusinessAcquisitionProFormaInformationAbstract
BusinessAcquisitionsProFormaRevenue	$ 122	$ 118	$ 607	$ 374	$ 339
BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	(515)	(1,978)	628	(2,915)	(6,439)
Business Acquisditions Pro Forma Amortization For Intangible Assets			329
BusinessAcquisitionPurchasePriceAllocationAbstract
BusinessAcquisitionPurchasePriceAllocationMethodology			The Company accounted for the Transaction under the acquisition method of accounting, which requires recording assets and liabilities at fair value (Level 3).
BusinessAcquisitionPurchasePriceAllocationStatus			The valuations derived from estimated fair value assessments and assumptions used by management are preliminary. While management believes that its preliminary estimates and assumptions underlying the valuations are reasonable, different estimates and assumptions could result in different values being assigned to individual assets acquired and liabilities assumed. The final valuations are pending appraisal valuations of certain tangible and intangible assets acquired, such as property, plant and equipment and technology assets, which may result in adjustments to the preliminary amounts recorded and goodwill, which could be material.
BusinessAcquisitionLineItems
Business Acquisition, Name of Acquired Entity								Acro Group
Business Acquisition, Description of Acquired Entity								a group of entities operating under the name of the Acro Group: Residential Renewable Technologies, Inc., Energy Efficiency Solar, Inc. and Lonestar Renewable Technologies Acquisition Corp.
Business Combination, Reason for Business Combination								began offering full-service residential solar integration services, including design, procurement, permitting, installation, financing services through third parties and warranty services for residential customers
Business Acquisition, Preexisting Relationship, Description								IES Residential had previously provided solar installation subcontracting services to the Acro Group
Date of Acro Acquisition Agreement								Feb. 08, 2013
Date of Acro Acquisition								Feb. 15, 2013
Receivable Owed By Acro Used In Purchase Price						$ 1,042	$ 2,263		$ 3,800