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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 9 Months Ended
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Sep. 30, 2015
Accounting Policies [Abstract] |
Summary of activity for the allowance for doubtful accounts | The following is a summary of activity for the allowance for doubtful accounts during the three and nine months ended September 30, 2015 and 2014:
| Dollars in Thousands
| Beginning Balance |  | Additions |  | Deductions |  | Ending Balance
Three Months Ended September 30, 2015 | $ | 8,158 |  |  | $ | 1,057 |  |  | $ | (175 | ) |  | $ | 9,040 |
Three Months Ended September 30, 2014 | $ | 3,700 |  |  | $ | 1,158 |  |  | $ | (400 | ) |  | $ | 4,458 |
Nine Months Ended September 30, 2015 | $ | 7,679 |  |  | $ | 3,787 |  |  | $ | (2,426 | ) |  | $ | 9,040 |
Nine Months Ended September 30, 2014 | $ | 3,497 |  |  | $ | 2,681 |  |  | $ | (1,720 | ) |  | $ | 4,458 |
Schedule of property and equipment, useful lives | Depreciation is computed using the straight-line method over the estimated useful lives of the related assets as follows:
Leasehold improvements | 1 to 10 years
Furniture and fixtures | 3 to 7 years
Production equipment | 3 to 7 years
Computer equipment | 3 to 7 years
Research and development equipment | 2 to 7 years

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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=49124121&loc=SL6953423-111524 + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + 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 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 + Details
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