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Summary of Significant Accounting Policies (Details Textual) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Sep. 30, 2012 Customer Segment | Sep. 30, 2011
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Number of segments in which company operates | 3 |
Allowance for doubtful accounts | $ 614 | $ 664
Percentage of inventory estimated using LIFO method | 42.00% | 54.00%
Weighted average shares excluded from the calculation of diluted earnings per share | 144 | 123
Interest rate swap agreement amount | 8,000 |
Summary of Significant Accounting Policies (Additional Textual) [Abstract] |  |
Accounts receivable, written off | 322 | 133
Bad debts expense | 164 | 196
Percentage of company's net sales from largest customers | 44.00% |
Number of customer for company | 4 |
Additional percentage of combined net sales to various direct subcontractors | 66.00% |
Number of largest customers | 5 |
Percentage of company's outstanding net accounts receivable due from largest customers | 39.00% |
Number of major customers having specified percentage of accounts receivable | 4 |
Percentage of company's outstanding net accounts receivable due from direct subcontractors | 61.00% |
Reserve for obsolete and excess inventory | 1,718 | 1,398
Foreign currency exchange contracts expiration | 1 year |
Research and development expense | 1,046 | 946
Foreign currency translation adjustment | 200 | 410
Net pension liability adjustment | 4,090 | 4,157
Net interest rate swap agreement adjustment | 35 |
Subsidiaries [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Carrying value of property in corporate identifiable assets | 1,790 |
Rental income | 433 | 443
Maximum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Short term investment maturity period | 1 year |
Intangible assets amortized over useful lives | 10 years |
Minimum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Short term investment maturity period | 3 months |
Intangible assets amortized over useful lives | 1 year |
Building and Building Improvements [Member] | Maximum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 50 years |
Building and Building Improvements [Member] | Minimum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Machinery and Equipment [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Tangible Asset Impairment Charges | $ 219 |
Machinery and Equipment [Member] | Maximum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 30 years |
Machinery and Equipment [Member] | Minimum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Software [Member] | Maximum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 10 years |
Software [Member] | Minimum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 1 year |
Leasehold Improvements [Member] | Maximum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 6 years |
Leasehold Improvements [Member] | Minimum [Member] |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Property, Plant and Equipment, Useful Life | 3 years |

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