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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Accounting Policies [Abstract] |
Summary of Adjustments in Allowances for Doubtful Accounts and Sales Adjustments | The following table summarizes the changes in the allowances for doubtful accounts and sales adjustments:
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Balance at beginning of year |  | $ | 1,725 |  |  | $ | 1,113 |  |  | $ | 1,621 |
Provisions for losses - accounts receivable |  |  | 1,756 |  |  |  | 1,897 |  |  |  | 729 |
Collection of accounts previously written off |  |  | 153 |  |  |  | — |  |  |  | — |
Deductions for accounts charged off or credits issued |  |  | (1,994 | ) |  |  | (1,285 | ) |  |  | (1,237 | )
Balance at end of year |  | $ | 1,640 |  |  | $ | 1,725 |  |  | $ | 1,113 |

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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