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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts |
19. | Valuation and qualifying accounts
The following table summarizes valuation and qualifying accounts activity during the years ended December 31, 2014, 2013 and 2012:
|  | Balance at beginning of year |  |  | Charged / credited to Net income / (loss) |  |  | Charges Utilized / Write-offs |  |  | Balance at end of year |
Allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2012 |  |  | 15,951,497 |  |  |  | 17,280,243 |  |  |  | (20,285,663 | ) |  |  | 12,946,077 |
Year ended December 31, 2013 |  |  | 12,946,077 |  |  |  | 19,093,704 |  |  |  | (13,044,977 | ) |  |  | 18,994,804 |
Year ended December 31, 2014 |  |  | 18,994,804 |  |  |  | 20,863,867 |  |  |  | (23,693,230 | ) |  |  | 16,165,441 |
Credit cards receivable allowance for chargebacks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2012 |  |  | 205,107 |  |  |  | 414,145 |  |  |  | (458,794 | ) |  |  | 160,458 |
Year ended December 31, 2013 |  |  | 160,458 |  |  |  | 877,312 |  |  |  | (28,699 | ) |  |  | 1,009,071 |
Year ended December 31, 2014 |  |  | 1,009,071 |  |  |  | 668,834 |  |  |  | (1,148,677 | ) |  |  | 529,228 |
Tax valuation allowance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2012 |  |  | 2,885,596 |  |  |  | 837,473 |  |  |  | (496,892 | ) |  |  | 3,226,177 |
Year ended December 31, 2013 |  |  | 3,226,177 |  |  |  | 398,223 |  |  |  | (535,287 | ) |  |  | 3,089,113 |
Year ended December 31, 2014 |  |  | 3,089,113 |  |  |  | 1,608,264 |  |  |  | (166,145 | ) |  |  | 4,531,232 |
Contingencies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2012 |  |  | 1,765,242 |  |  |  | 2,700,988 |  |  |  | (1,666,033 | ) |  |  | 2,800,197 |
Year ended December 31, 2013 |  |  | 2,800,197 |  |  |  | 3,358,538 |  |  |  | (2,828,627 | ) |  |  | 3,330,108 |
Year ended December 31, 2014 |  |  | 3,330,108 |  |  |  | 3,650,230 |  |  |  | (3,971,801 | ) |  |  | 3,008,537 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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