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Income Taxes (Tables)
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12 Months Ended |
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Dec. 31, 2013
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| Income Taxes |
|
| Schedule of domestic and foreign components of net income (loss) before income tax expense |
The domestic and foreign components of net income (loss) before income tax expense consists of the following for the periods shown below (in thousands):
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Years Ended December 31, |
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2011 |
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2012 |
|
2013 |
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|
Income (loss) before income taxes: |
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|
|
Domestic |
|
$ |
(4,697 |
) |
$ |
(4,055 |
) |
$ |
3,633 |
|
|
Foreign |
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|
812 |
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|
473 |
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|
118 |
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| |
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Total income (loss) before income taxes |
|
$ |
(3,885 |
) |
$ |
(3,582 |
) |
$ |
3,751 |
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| Schedule of components of provision for income taxes |
The provision for income taxes consisted of the following components (in thousands):
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Years Ended December 31, |
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2011 |
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2012 |
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2013 |
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Current: |
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Domestic |
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Federal |
|
$ |
— |
|
$ |
15 |
|
$ |
64 |
|
|
State |
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|
— |
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|
57 |
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|
53 |
|
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Foreign |
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— |
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|
69 |
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|
147 |
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| |
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Total current tax expense |
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— |
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|
141 |
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|
264 |
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Deferred: |
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Domestic |
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Federal |
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|
(1,773 |
) |
|
(710 |
) |
|
1,572 |
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State |
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|
(280 |
) |
|
(65 |
) |
|
44 |
|
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Foreign |
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|
251 |
|
|
88 |
|
|
(16 |
) |
|
Valuation allowance |
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|
1,802 |
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|
687 |
|
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(1,616 |
) |
| |
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Total deferred tax benefit |
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— |
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— |
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(16 |
) |
| |
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Total income tax expense |
|
$ |
— |
|
$ |
141 |
|
$ |
248 |
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| Schedule of reconciliation from the U.S. statutory federal income tax rate to the effective income tax rate |
A reconciliation from the U.S. statutory federal income tax rate to the effective income tax rate follows:
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Years Ended December 31, |
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2011 |
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2012 |
|
2013 |
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Federal income tax rate |
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|
(34.0 |
)% |
|
(34.0 |
)% |
|
34.0 |
% |
|
State taxes, net of federal benefit |
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|
(4.1 |
) |
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1.1 |
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1.1 |
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Stock-based compensation |
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9.1 |
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15.0 |
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22.7 |
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Stock warrant |
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— |
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— |
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6.4 |
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Research and development credits |
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(16.0 |
) |
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— |
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(18.3 |
) |
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Change in valuation allowance |
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46.4 |
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17.3 |
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(42.0 |
) |
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Other, net |
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(1.4 |
) |
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4.5 |
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2.7 |
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Effective income tax rate |
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0.0 |
% |
|
3.9 |
% |
|
6.6 |
% |
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| Schedule of deferred tax assets and (liabilities) |
Deferred tax assets and (liabilities) are comprised of the following (in thousands):
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December 31, |
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|
2012 |
|
2013 |
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|
Deferred Tax Assets: |
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|
Reserves and accruals |
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$ |
3,396 |
|
$ |
2,146 |
|
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Inventories |
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|
606 |
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|
1,059 |
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Net operating loss carryforwards |
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30,165 |
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27,865 |
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Property, plant and equipment |
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1,054 |
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1,327 |
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Stock-based compensation |
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|
783 |
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1,233 |
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Research and development credit carryforwards |
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3,254 |
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4,091 |
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Other |
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|
204 |
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|
163 |
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Total deferred tax assets |
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39,462 |
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|
37,884 |
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Valuation allowance |
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(39,462 |
) |
|
(37,842 |
) |
| |
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Total deferred tax assets |
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$ |
— |
|
$ |
42 |
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Deferred Tax Liabilities: |
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Undistributed earnings of foreign subsidiaries |
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— |
|
$ |
(15 |
) |
|
Property and equipment |
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— |
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(11 |
) |
| |
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Total deferred tax liabilities |
|
$ |
— |
|
$ |
(26 |
) |
| |
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Net deferred tax asset |
|
$ |
— |
|
$ |
16 |
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| Schedule of net operating loss and tax credit carryforwards |
Net operating loss and tax credit carryforwards as of December 31, 2013 are as follows (in thousands):
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Amount |
|
Expiration Years |
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Net operating losses, federal |
|
$ |
77,435 |
|
2023 - 2031 |
|
Net operating losses, state |
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|
75,640 |
|
2018 - 2031 |
|
Tax credit carryforwards, federal |
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|
3,158 |
|
2023 - 2033 |
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Tax credit carryforwards, state |
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|
1,413 |
|
2018 - 2028 |
|
Net operating losses, foreign |
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|
21 |
|
None |
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| Schedule of reconciliation of the changes in the gross balance of unrecognized tax benefits, excluding interest and penalties |
The following is a reconciliation of the changes in the gross balance of unrecognized tax benefits, excluding interest and penalties (in thousands):
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Years Ended December 31, |
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|
2011 |
|
2012 |
|
2013 |
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|
Balance at the beginning of the period |
|
$ |
1,862 |
|
$ |
2,318 |
|
$ |
2,318 |
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Current year additions |
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|
456 |
|
|
— |
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|
625 |
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Balance at the end of the period |
|
$ |
2,318 |
|
$ |
2,318 |
|
$ |
2,943 |
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