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Other Intangible Assets (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Other Intangible Assets |  |  |  |
Gross amount | $ 2,987,000 | $ 2,987,000 |  |
Accumulated amortization | (2,351,000) | (2,034,000) |  |
Net balance | $ 636,000 | 953,000 |  |
Amortization expense related to intangible assets |  | 318,000 | $ 393,000 | $ 478,000
Future amortization |  |  |  |
2016 |  | 318,000 |  |
2017 |  | 318,000 |  |
Total |  | 636,000 |  |
Patents |  |  |  |
Other Intangible Assets |  |  |  |
Estimated useful life | 14 years |  |  |
Gross amount | $ 429,000 | 429,000 |  |
Accumulated amortization | $ (429,000) | (429,000) |  |
Non-compete |  |  |  |
Other Intangible Assets |  |  |  |
Estimated useful life | 5 years |  |  |
Gross amount | $ 512,000 | 512,000 |  |
Accumulated amortization | (387,000) | (325,000) |  |
Net balance | $ 125,000 | 187,000 |  |
Customer list |  |  |  |
Other Intangible Assets |  |  |  |
Estimated useful life | 5 years |  |  |
Gross amount | $ 2,046,000 | 2,046,000 |  |
Accumulated amortization | (1,535,000) | (1,280,000) |  |
Net balance | $ 511,000 | $ 766,000 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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