|
Accrued Expenses - Additional Information (Detail) (USD $)
|
3 Months Ended | 6 Months Ended |
|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2012
|
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| Accrued Liabilities [Line Items] | ||
| Reduction in the estimate for warranty claims recorded as a credit in cost of revenue | $ 93,000 | $ 191,000 |