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2. ACCOUNTS RECEIVABLE (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounts Receivable Tables |
Changes in the allowance for doubtful accounts |
|  | Year ended December 31, |
|  | 2014 |  |  | 2013 |
Balance at Beginning of Period |  | $ | 14,740 |  |  | $ | 12,908 |
Charged to costs and expenses |  |  | - |  |  |  | 2,796 |
Charged to other accounts |  |  | - |  |  |  | - |
Write-offs, net of recoveries |  |  | (2,796 | ) |  |  | (964 | )
Balance at End of Period |  | $ | 11,944 |  |  | $ | 14,740 |

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