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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2013
Income Taxes [Abstract] |
Income Tax Provision | A reconciliation of the total income tax provision tax rate to the statutory federal income tax rate of 34% for the years ended December 31, 2013, 2012 and 2011 is as follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Income tax expense (benefit) at federal statutory rate |  |  | (34.00 | )% |  |  | (34.00 | )% |  |  | (34.00 | )%
Income tax expense (benefit) at state statutory rate |  |  | (3.54 | )% |  |  | (2.79 | )% |  |  | (3.36 | )%
Gain on previously held equity interest in joint venture |  |  | (7.02 | ) % |  |  | 0.00 | % |  |  | 0.00 | %
Mark to market permanent adjustment |  |  | (2.15 | )% |  |  | (0.24 | )% |  |  | (5.02 | )%
Change in federal valuation allowance |  |  | 80.13 | % |  |  | 35.86 | % |  |  | 45.72 | %
Change in state rate |  |  | (1.01 | )% |  |  | (8.36 | )% |  |  | (3.29 | )%
Deferred revenue |  |  | 0.00 | % |  |  | 000 | % |  |  | (2.09 | )%
Acquired NOL’s/Intangibles from joint venture |  |  | (33.40 | ) % |  |  | 0.00 | % |  |  | 0.00 | %
Foreign rate differential |  |  | 2.48 | % |  |  | (0.04 | )% |  |  | 0.00 | %
Other, net |  |  | (1.49 | )% |  |  | 9.57 | % |  |  | 2.04 | %
|  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Deferred Tax Assets and Liabilities | The tax effects of temporary differences that give rise to significant portions of our deferred tax assets and deferred tax liabilities as of December 31, 2013 and 2012 are as follows:
|  | 2013 |  |  | 2012 |
Deferred tax assets: |  |  |  |  |  |
Allowances and reserves |  | $ | 639,000 |  |  | $ | 169,000 |
Accrued expenses |  |  | 718,000 |  |  |  | 1,053,000 |
Deferred revenue and gain-on-sale |  |  | 79,000 |  |  |  | 1,138,000 |
Stock based compensation |  |  | 6,962,000 |  |  |  | 5,635,000 |
Net operating loss carryforwards |  |  | 107,846,000 |  |  |  | 87,045,000 |
Income tax credit carryforwards |  |  | 6,710,000 |  |  |  | 5,729,000 |
Property and equipment, principally due to differences in depreciation |  |  | 804,000 |  |  |  | 422,000 |
Other,net |  |  | 296,000 |  |  |  | 295,000 |
|  |  | 124,054,000 |  |  |  | 101,486,000 |
Valuation allowance |  |  | (122,450,000 | ) |  |  | (101,476,000 | )
Total deferred tax assets, net of allowance |  |  | 1,604,000 |  |  |  | 10,000 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Intangibles |  |  | (1,604,000 | ) |  |  | (10,000 | )
Total deferred tax liability |  |  | (1,604,000 | ) |  |  | (10,000 | )
Net deferred tax assets (liability) |  | $ | — |  |  | $ | — |
Unrecognized Tax Benefits Activity | Following is a tabular reconciliation of the unrecognized tax benefits activity during the years ended December 31, 2013, 2012 and 2011:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Unrecognized Tax Benefits – Beginning |  | $ | 1,394,000 |  |  | $ | 1,304,000 |  |  | $ | 1,166,000 |
Gross increases – tax positions in prior period |  |  | 69,000 |  |  |  | — |  |  |  | — |
Gross decreases – tax positions in prior period |  |  | — |  |  |  | — |  |  |  | — |
Gross increase – current-period tax positions |  |  | 260,000 |  |  |  | 90,000 |  |  |  | 138,000 |
Settlements |  |  | — |  |  |  | — |  |  |  | — |
Lapse of statute of limitations |  |  | — |  |  |  | — |  |  |  | — |
Unrecognized Tax Benefits – Ending |  | $ | 1,723,000 |  |  | $ | 1,394,000 |  |  | $ | 1,304,000 |

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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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- Definition Tabular disclosure of the change in unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 217 -URI http://asc.fasb.org/extlink&oid=21917533&loc=d3e36027-109320 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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