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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | VALUATION AND QUALIFYING ACCOUNTS VALUATION AND QUALIFYING ACCOUNTS Years ended December 31, 2011 and 2012
Column A Description |  | Column B Balance at Beginning of Period |  |  | Column C Charged to Costs and Expenses |  |  | Column D Deductions |  |  | Column E Balance at End of Period |
Year ended December 31, 2011: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts (deducted from accounts receivable) |  |  | 907,819 |  |  |  | 1,164,058 |  |  |  | 1,617,245 |  |  |  | 454,632 |
Valuation allowance for deferred tax assets |  |  | 594,366 |  |  |  | 74,665 |  |  |  | 15,112 |  |  |  | 653,919 |
Year ended December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts (deducted from accounts receivable) |  |  | 454,632 |  |  |  | 1,219,698 |  |  |  | 1,036,470 |  |  |  | 637,860 |
Valuation allowance for deferred tax assets |  |  | 653,919 |  |  |  | 1,940 |  |  |  | 12,307 |  |  |  | 643,552 |

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: 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=6881521&loc=d3e24092-122690 + Details
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