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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2012
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax, Domestic and Foreign | ncome before taxes for domestic and foreign operations consisted of the following:
| Year ended December 31,
| 2012 |  | 2011
Domestic | $ | 42,990 |  |  | $ | 10,318 |
Foreign | (435 | ) |  | 278 |
Total | $ | 42,555 |  |  | $ | 10,596 |
Schedule of Components of Income Tax Expense (Benefit) | The Company's (provision) for income taxes consisted of the following:
| Year ended December 31,
| 2012 |  | 2011
Current: |  |  |
Federal | $ | (16,910 | ) |  | $ | (2,106 | )
State | (381 | ) |  | (99 | )
Foreign | (74 | ) |  | (46 | )
Total current | (17,365 | ) |  | (2,251 | )
Deferred: |  |  |
Federal | 455 |  |  | (1,271 | )
State | 46 |  |  | (23 | )
Foreign | 160 |  |  | — |
| 661 |  |  | (1,294 | )
Change in valuation allowance | 796 |  |  | (122 | )
Total deferred | 1,457 |  |  | (1,416 | )
(Provision) for income taxes | $ | (15,908 | ) |  | $ | (3,667 | )
Schedule of Effective Income Tax Rate Reconciliation |
| Year ended December 31,
| 2012 |  | 2011
Tax (provision) at Federal statutory rate | $ | (14,894 | ) |  | $ | (3,603 | )
State income tax (provision), net of federal benefit | (1,476 | ) |  | (162 | )
Research and development tax credits | 357 |  |  | 316 |
Foreign earnings or losses taxed at different rates | (136 | ) |  | 48 |
Other | (555 | ) |  | (266 | )
Change in valuation allowance | 796 |  |  | — |
Tax (provision) | $ | (15,908 | ) |  | $ | (3,667 | )
Schedule of Deferred Tax Assets and Liabilities |
| As of December 31, 2012 |  | As of December 31, 2011
| Current |  | Long-term |  | Current |  | Long-term
Deferred revenue | $ | 856 |  |  | $ | — |  |  | $ | 860 |  |  | $ | — |
Basis difference in intangible assets | — |  |  | 159 |  |  | — |  |  | (580 | )
Inventory reserve | 1,871 |  |  | — |  |  | 1,598 |  |  | — |
Net operating loss carryforwards | — |  |  | 667 |  |  | — |  |  | 364 |
Research and development tax credits | — |  |  | 248 |  |  | — |  |  | 1,033 |
Accrued expenses | 140 |  |  | — |  |  | 182 |  |  | — |
Stock-based compensation | — |  |  | 684 |  |  | — |  |  | 742 |
Allowance for sales returns and doubtful accounts | 20 |  |  | — |  |  | 56 |  |  | — |
Difference in property and equipment basis | — |  |  | (475 | ) |  | — |  |  | (646 | )
Other | 462 |  |  | (19 | ) |  | 291 |  |  | 52 |
Total net deferred income tax asset | 3,349 |  |  | 1,264 |  |  | 2,987 |  |  | 965 |
Less: Valuation allowance | (201 | ) |  | (69 | ) |  | — |  |  | (1,066 | )
Net deferred income tax asset (liability) | $ | 3,148 |  |  | $ | 1,195 |  |  | $ | 2,987 |  |  | $ | (101 | )
Schedule of Unrecognized Tax Benefits Roll Forward | A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax positions is as follows:
| Year ended December 31,
| 2012 |  | 2011
Balance - beginning of year | $ | 523 |  |  | $ | 404 |
Additions based on tax positions related to the current year | 795 |  |  | 229 |
Additions for tax positions of prior years | 1,082 |  |  | — |
Reductions for tax positions of prior years | — |  |  | (88 | )
Settlements | — |  |  | — |
Lapse in statutes of limitations | (16 | ) |  | (22 | )
Unrecognized tax benefits, ending balance | $ | 2,384 |  |  | $ | 523 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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