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Other Intangible Assets | 12 Months Ended
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Dec. 31, 2012
Other Intangible Assets |
Other Intangible Assets | (5) Other Intangible Assets The carrying values of the Company’s definite-lived intangible assets as of December 31, 2012, and 2011, are as follows:
|  | Patents |  | Non- Compete |  | Customer List |  | Total |
Estimated useful life |  | 14 years |  | 5 years |  | 5 years |  |  |
Gross amount at December 31, 2012 |  | $ | 428,806 |  | $ | 512,000 |  | $ | 2,306,436 |  | $ | 3,247,242 |
Accumulated amortization at December 31, 2012 |  | (428,806 | ) | (156,500 | ) | (577,995 | ) | $ | (1,163,301 | )
Net balance at December 31, 2012 |  | $ | — |  | $ | 355,500 |  | $ | 1,728,441 |  | $ | 2,083,941 |
Gross amount at December 31, 2011 |  | $ | 428,806 |  | $ | 200,000 |  | $ | 769,436 |  | $ | 1,398,242 |
Accumulated amortization at December 31, 2011 |  | (425,052 | ) | (126,500 | ) | (448,191 | ) | $ | (999,743 | )
Net balance at December 31, 2011 |  | $ | 3,754 |  | $ | 73,500 |  | $ | 321,245 |  | $ | 398,499 |
Amortization expense related to intangible assets was $163,558, $195,330, and $223,908 for the years ended December 31, 2012, 2011, and 2010, respectively. Future amortization for the years ending December 31 will be approximately:
2013 |  | 529,604 |
2014 |  | 444,937 |
2015 |  | 369,800 |
2016 |  | 369,800 |
2017 |  | 369,800 |
Total: |  | $ | 2,083,941 |

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