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Revolving Credit Facility and Long-Term Debt - Additional Information (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
Line of Credit Facility [Line Items] |  |
Line of credit facility expiration date | Oct. 01, 2017 |
Revolving credit facility borrowing capacity | $ 19,000,000 | $ 4,500,000
Letters of credit outstanding amount | 19,400,000 |
Interest calculation under revolving credit facility | The Agreement also provides for an unused commitment fee of 0.25% per annum on the average daily-unused amount of the revolving credit facility. |
Ratio of restricted and unrestricted cash and marketable securities to workers' compensation and safety incentive liabilities | 1.0 |
Prohibition on incurring additional indebtedness without the prior approval of the Bank in purchase money financing | 200,000 |
September 30, 2015 [Member] |  |
Line of Credit Facility [Line Items] |  |
Funded Debt to EBITDA ratio | 1.50 |
Thereafter [Member] |  |
Line of Credit Facility [Line Items] |  |
Funded Debt to EBITDA ratio | 1.25 |
Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Reduction in borrowing capacity | 2,500,000 |
Maximum [Member] | September 30, 2014 [Member] |  |
Line of Credit Facility [Line Items] |  |
Funded Debt to EBITDA ratio | 1.75 |
Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Minimum Fixed Charge Coverage ratio | 1.25 |
Revolving Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Outstanding borrowings on the revolving credit facility | 0 |
LIBOR plus rate | 1.75% |
Unused commitment fee on unused amount | 0.25% |
Interest calculation under revolving credit facility | The rate is calculated based on LIBOR plus 1.75% |
Term Loan [Member] |  |
Line of Credit Facility [Line Items] |  |
LIBOR plus rate | 2.25% |
Term loan with principal bank | 5,300,000 |
Payment of monthly installments of term loan | $ 18,375 |
Term loan from Bank, Interest rate description | One month LIBOR plus 2.25% |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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 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 2: 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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