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Schedule II - Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Allowance for Doubtful Accounts [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance At Beginning of Year | $ 627 | $ 245 | $ 228
Additions Charged to Operations | 1,936 | 439 | 41
Deductions From Reserves | 114 | 57 | 24
Balance At End of Year | 2,449 | 627 | 245
Warranty [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance At Beginning of Year | 2,329 | 1,525 | 2,279
Additions Charged to Operations | 5,055 | 6,261 | 2,642
Deductions From Reserves | 5,140 | 5,457 | 3,396
Balance At End of Year | 2,244 | 2,329 | 1,525
Deferred Tax Asset Valuation Allowance [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance At Beginning of Year | 63,881 | 36,395 | 21,783
Additions Charged to Operations | 15,577 | 27,486 | 14,612
Deductions From Reserves | 0 | 0 | 0
Balance At End of Year | 79,458 | 63,881 | 36,395
Sales Returns and Allowances [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance At Beginning of Year | 911 | 545 | 346
Additions Charged to Operations | 196 | 497 | 911
Deductions From Reserves | 380 | 131 | 712
Balance At End of Year | $ 727 | $ 911 | $ 545

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + 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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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. + 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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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + 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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