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Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2013 Bank | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2013 Selling, general and administrative expenses | Dec. 31, 2012 Selling, general and administrative expenses | Dec. 31, 2001 Airshield Corporation
Accounting Policies [Abstract] |  |  |  |  |  |  |
Tooling in progress, net liability | $ 334 |  |  |  |  |  |
Billed contracts receivable | 3,344 | 6,624 |  |  |  |  |
Costs incurred on uncompleted contracts | 3,010 | 6,621 |  |  |  |  |
Tooling in progress | 334 | 3 |  |  |  |  |
Number of banks in which cash is held | 1 |  |  |  |  |  |
Cash and cash equivalents | 2,266 | 7,838 |  | 4,634 |  |  |
Allowance for doubtful accounts | 141 | 258 |  |  |  |  |
Allowance for chargebacks | 973 | 984 |  |  |  |  |
Allowance for slow moving and obsolete inventory | 792 | 987 |  |  |  |  |
Self-insurance reserve | 1,092 | 1,065 |  |  |  |  |
Components of accumulated other comprehensive income: |  |  |  |  |  |  |
Total | 4,872 | 3,187 | 3,877 |  |  |  |
Research and development expense | 466 | 449 |  |  |  |  |
Business acquisition: |  |  |  |  |  |  |
Goodwill, acquired during period |  |  |  |  |  |  | 1,097
Foreign currency transaction losses |  |  |  |  | $ 27 | $ 4 |

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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