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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Accounting Policies [Abstract] |
Schedule of changes in the allowance for doubtful accounts | Changes in the allowance for doubtful accounts are as follows (in thousands):
| Year ended December 31,
| 2013 |  | 2012 |  | 2011
Balance, beginning of year | $ | 714 |  |  | $ | 571 |  |  | $ | 262 |
Charged to provision for doubtful accounts | 570 |  |  | 512 |  |  | 661 |
Write-offs | (412 | ) |  | (369 | ) |  | (352 | )
Balance, end of year | $ | 872 |  |  | $ | 714 |  |  | $ | 571 |
Schedule of depreciation or amortization of property and equipment | Depreciation or amortization of property and equipment, including assets held under capital leases, is calculated using the straight-line method over the asset’s estimated useful life:
Buildings and leasehold |
improvements | 2-30 years
Machinery, equipment and rental |
tools | 7-10 years
Furniture and fixtures | 3 years
Transportation equipment | 2-5 years
Computer equipment and software | 3-7 years

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- Definition Tabular disclosure of the useful lives of major classes of property, plant and equipment. + References No definition available. + Details
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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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