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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2011
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS [Abstract] |
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS For the years ended December 31, 2011, 2010 and 2009 (in thousands of dollars)
|  | Balance at beginning of year |  |  | Additions (A) |  |  | Deductions (B) |  |  | Other (C) |  |  | Balance at end of year |
Allowance for doubtful accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2011 |  | $ | 306 |  |  | $ | 483 |  |  | $ | (256 | ) |  | $ | (59 | ) |  | $ | 474 |
Year ended December 31, 2010 |  | $ | 751 |  |  | $ | 460 |  |  | $ | ( 1,014 | ) |  | $ | 109 |  |  | $ | 306 |
Year ended December 31, 2009 |  | $ | 122 |  |  | $ | 663 |  |  | $ | (34 | ) |  | $ | - |  |  | $ | 751 |
| (A) | Includes increases to allowances for doubtful accounts, net of any equipment recovered
| (B) | Includes write off of uncollectible accounts receivable, net of any equipment recovered
| (C) | Includes collections fees incurred and product sales amounts deferred that do not meet revenue recognition criteria, net of cash received

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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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