Business Combination (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Feb. 14, 2013	Feb. 09, 2013	Sep. 30, 2012
BusinessAcquisitionProFormaInformationAbstract
BusinessAcquisitionsProFormaRevenue	$ 48	$ 122	$ 109	$ 252	$ 221
BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	423	(916)	(1,435)	(1,782)	(3,850)
Business Acquisditions Pro Forma Amortization For Intangible Assets					82
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	$ 3,800	$ 2,263