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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract] |
Schedule II: Valuation and Qualifying Accounts | Valuation and Qualifying Accounts For the Years Ended December 31, 2012, 2011 and 2010 (in thousands):
|  | Balance At Beginning of Year |  |  | Additions Charged to Operations |  |  | Deductions From Reserves |  |  | Balance At End of Year |
Allowance for Doubtful Accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2012 |  | $ | 245 |  |  | $ | 439 |  |  | $ | 57 |  |  | $ | 627 |
December 31, 2011 |  |  | 228 |  |  |  | 41 |  |  |  | 24 |  |  |  | 245 |
December 31, 2010 |  |  | 741 |  |  |  | 141 |  |  |  | 654 |  |  |  | 228 |
Warranty: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2012 |  |  | 1,525 |  |  |  | 6,261 |  |  |  | 5,457 |  |  |  | 2,329 |
December 31, 2011 |  |  | 2,279 |  |  |  | 2,642 |  |  |  | 3,396 |  |  |  | 1,525 |
December 31, 2010 |  |  | 3,039 |  |  |  | 1,350 |  |  |  | 2,110 |  |  |  | 2,279 |
Deferred Tax Asset Valuation Allowance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2012 |  |  | 36,395 |  |  |  | 27,486 |  |  |  | 0 |  |  |  | 63,881 |
December 31, 2011 |  |  | 21,783 |  |  |  | 14,612 |  |  |  | 0 |  |  |  | 36,395 |
December 31, 2010 |  |  | 3,897 |  |  |  | 22,724 |  |  |  | 4,838 |  |  |  | 21,783 |
Sales Returns Allowance: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2012 |  |  | 545 |  |  |  | 497 |  |  |  | 131 |  |  |  | 911 |
December 31, 2011 |  |  | 346 |  |  |  | 911 |  |  |  | 712 |  |  |  | 545 |
December 31, 2010 |  |  | 303 |  |  |  | 188 |  |  |  | 145 |  |  |  | 346 |

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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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