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Debt and Leases - Debt (Details) (USD $) |  |  | 12 Months Ended |  | 12 Months Ended |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Capex loan | Dec. 31, 2012 Capex loan | Dec. 31, 2013 Mexican loan | Dec. 31, 2012 Mexican loan | Dec. 31, 2013 Industrial Development Revenue Bond | Dec. 31, 2012 Industrial Development Revenue Bond | May 31, 1998 Industrial Development Revenue Bond | Dec. 31, 2013 Revolving line of credit | Dec. 31, 2012 Revolving line of credit | Dec. 31, 2013 Loans payable Capex loan | Dec. 31, 2012 Loans payable Capex loan | Dec. 31, 2013 Loans payable Mexican loan | Dec. 31, 2012 Loans payable Mexican loan | Dec. 31, 2009 Loans payable Mexican loan | Dec. 31, 2013 Loans payable Revolving line of credit | Dec. 31, 2012 Loans payable Revolving line of credit | Dec. 31, 2013 Loans payable Mexican Expansion Revolving Loan | Dec. 31, 2013 Line of credit | Dec. 31, 2013 Line of credit Capex loan | Dec. 31, 2013 Line of credit Mexican loan | Dec. 31, 2013 Line of credit Revolving line of credit | Dec. 31, 2012 Line of credit Revolving line of credit | Dec. 31, 2012 Line of credit Letter of credit
Debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt | $ 5,743,000 | $ 9,477,000 | $ 4,143,000 | $ 5,857,000 | $ 1,600,000 | $ 3,200,000 | $ 0 | $ 420,000 |  | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt | (3,314,000) | (3,734,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 2,429,000 | 5,743,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  | 1.77% | 1.96% | 1.73% | 1.94% |  | 0.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment term |  |  | 7 years |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | 12,000,000 |  | 8,000,000 |  |  |  | 7,500,000 |  |  | 12,000,000 |  |  |  |  |  |  |  |  | 12,000,000 | 8,000,000 |  |  | 3,332,493
Percent of subsidiary stock not security for financing | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65.00% |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,000,000 |  |  | 18,000,000 | 8,000,000 |
Description of variable rate basis |  |  |  |  |  |  |  |  |  |  |  | 30 day LIBOR |  | daily LIBOR |  | daily LIBOR |  |  |  | daily LIBOR |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  | 1.60% | 1.75% | 1.60% | 1.75% |  | 1.60% | 1.75% | 1.60% |  |  |  |  |  |
Interest rate at period end |  |  |  |  |  |  |  |  |  |  |  | 0.17% |  | 0.13% |  |  |  |  |  |  |  |  |  |  |
Annual maturities of long-term debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 3,314,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 1,714,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | $ 715,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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