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Debt (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Debt Instrument [Line Items] |  |  |  |  |
Debt | $ 6,600,000 | $ 9,477,000 | $ 6,600,000 | $ 9,477,000 |
Current portion of long-term debt | (3,314,000) | (3,734,000) | (3,314,000) | (3,734,000) |
Long-term debt | 3,286,000 | 5,743,000 | 3,286,000 | 5,743,000 | 5,743,000
Letter of credit - original face amount | 3,332,493 |  | 3,332,493 |  |
Percent of subsidiary stock not security for financing | 65.00% |  | 65.00% |  |
Derivatives not designated as hedging instruments, interest rate swap liabilities | 143,000 |  | 143,000 |  | 213,000
Interest expense for settlements related to swaps | 31,000 | 43,000 | 62,000 | 93,000 |
Capex Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt | 5,000,000 | 5,857,000 | 5,000,000 | 5,857,000 |
Long-term Debt, Maturities, Repayment Term |  |  | 7 years |  |
Mexican Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt | 1,600,000 | 3,200,000 | 1,600,000 | 3,200,000 |
Long-term Debt, Maturities, Repayment Term |  |  | 5 years |  |
Industrial Development Revenue Bond [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt | 0 | 420,000 | 0 | 420,000 |
Line of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt | 0 | 0 | 0 | 0 |
Mexican Expansion Revolving Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt | 0 | 0 | 0 | 0 |
Revolving Line of Credit [Member] | Line of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 18,000,000 |  | 18,000,000 |  | 8,000,000
Debt Instrument, Planned Capital Improvements Excluded From Fixed Charge |  |  | 18,000,000 |  |
Capex Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount | 12,000,000 |  | 12,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.94% |  | 1.94% |  | 1.96%
Mexican Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount | 8,000,000 |  | 8,000,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.94% |  | 1.94% |  | 1.94%
Industrial Development Revenue Bond [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 0.00% |  | 0.00% |  | 0.30%
Line of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 8,000,000 |  | 8,000,000 |  |
Debt Instrument, Description of Variable Rate Basis |  |  | daily LIBOR |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.94% |  | 1.94% |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  | 1.75% |  |
Mexican Expansion Revolving Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  | 1.75% |  |
Mexican Expansion Revolving Loan [Member] | Loans Payable [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount | 10,000,000 |  | 10,000,000 |  |
Industrial Development Revenue Bond Swap Agreement [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Derivative, Fixed Interest Rate | 4.89% |  | 4.89% |  |
Derivative, Description of Variable Rate Basis |  |  | 76% of the 30-day commercial paper rate |  |
Description of Reclassification of Cash Flow Hedge Gain (Loss) |  |  | The pre-tax loss previously recognized in Accumulated Other Comprehensive Income, totaling $200,000 as of December 31, 2009, was amortized as an increase to interest expense of $5,000 per month, or $3,000 net of tax, over the remaining term of the interest rate swap agreement. |  |
Derivatives not designated as hedging instruments, interest rate swap liabilities |  |  |  |  | 8,000
Interest income (loss) for mark-to-market adjustment of swap fair value |  |  | 8,000 |  |
Notional amount of swap |  |  |  |  | 420,000
Capex Loan Swap Agreement [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Derivative, Fixed Interest Rate | 0.00% |  | 0.00% |  |
Derivative, Description of Variable Rate Basis |  |  | LIBOR |  |
Derivative, Variable Interest Rate | 0.00% |  | 0.00% |  |
Description of Reclassification of Cash Flow Hedge Gain (Loss) |  |  | The pre-tax loss previously recognized in Accumulated Other Comprehensive Income, totaling $146,000 as of March 31, 2009, is being amortized as an increase to interest expense of $2,000 per month, or $1,000 net of tax, over the remaining term of the interest rate swap agreement. |  |
Derivatives not designated as hedging instruments, interest rate swap liabilities | 143,000 |  | 143,000 |  | 205,000
Interest income (loss) for mark-to-market adjustment of swap fair value |  |  | 62,000 |  |
Notional amount of swap | $ 5,000,000 |  | $ 5,000,000 |  | $ 5,857,000

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- Definition The amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Carrying value as of the balance sheet date of the sum of short-term debt and current maturities of long-term debt and capital lease obligations, which are due within one year (or one business 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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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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