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Summary of Significant Accounting Policies (Details 3) (USD $) In Millions, unless otherwise specified |  |  | 3 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Dec. 31, 2012 Net sales Major Customers item | Dec. 31, 2011 Net sales Major Customers item | Dec. 31, 2012 Net sales Major Customers Eclipse Aerospace | Dec. 31, 2011 Net sales Major Customers Eclipse Aerospace | Dec. 31, 2012 Net sales Major Customers AAI | Dec. 31, 2011 Net sales Major Customers AAI | Dec. 31, 2012 Inventory purchases Major Suppliers item | Dec. 31, 2011 Inventory purchases Major Suppliers item
Concentrations |  |  |  |  |  |  |  |  |  |
Number of major customers |  |  | 2 | 2 |  |  |  |  |  |
Concentrations risk (as a percent) |  |  |  |  | 29.00% | 29.00% | 13.00% | 19.00% | 10.00% | 10.00%
Number of major suppliers |  |  |  |  |  |  |  |  | 1 | 1
Concentration of Credit Risk |  |  |  |  |  |  |  |  |  |
Reserves for doubtful accounts | $ 0.2 | $ 0.2 |  |  |  |  |  |  |  |

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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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