v3.8.0.1

Note 18 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | December 31, 201 7 |  |  | December 31, 201 6 |
Current: |  |  |  |  |  |  |  |
Federal |  | $ | (702 | ) |  | $ | (39 | )
State |  |  | 1 |  |  |  | 6 |
Total Current |  |  | (701 | ) |  |  | (33 | )
Deferred: |  |  |  |  |  |  |  |
Federal |  |  | — |  |  |  | (1 | )
State |  |  | — |  |  |  | — |
Total D eferred |  |  | — |  |  |  | (1 | )
Provision (benefit) for income taxes |  | $ | (701 | ) |  | $ | (34 | )
Schedule of Deferred Tax Assets [Table Text Block] |
|  | December 31, 201 7 |  |  | December 31, 201 6 |
Deferred tax assets: |  |  |  |  |  |  |  |
Accruals and other |  | $ | 2,717 |  |  | $ | 3,746 |
Research credits |  |  | 6,530 |  |  |  | 5,670 |
Net operating loss carryforward |  |  | 31,064 |  |  |  | 36,224 |
Section 59(e) R&D expenditures |  |  | 12,156 |  |  |  | 16,782 |
Deferred revenue |  |  | 18,384 |  |  |  | 24,836 |
AMT credit |  |  | — |  |  |  | 703 |
Total deferred tax assets |  |  | 70,851 |  |  |  | 87,961 |
Valuation allowance |  |  | (70,851 | ) |  |  | (87,961 | )
Net deferred tax assets |  | $ | — |  |  | $ | — |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | Year Ended December 31, |
|  | 201 7 |  |  | 2016 |  |  | 2015 |
Tax at statutory federal rate |  | $ | (17,751 | ) |  | $ | (14,685 | ) |  | $ | (8,037 | )
State tax —net of federal benefit |  |  | 350 |  |  |  | (73 | ) |  |  | 2,853 |
PIPE Warrant liability |  |  | (70 | ) |  |  | (260 | ) |  |  | (726 | )
General Business credits |  |  | (316 | ) |  |  | (360 | ) |  |  | (455 | )
Stock Options |  |  | 42 |  |  |  | 1,115 |  |  |  | 1,559 |
Other |  |  | 51 |  |  |  | 33 |  |  |  | 73 |
Change in valuation allowance |  |  | (17,110 | ) |  |  | 14,196 |  |  |  | 5,493 |
Tax Reform – Tax Rate Change |  |  | 34,103 |  |  |  | — |  |  |  | — |
Provision for income taxes |  | $ | (701 | ) |  | $ | (34 | ) |  | $ | 760 |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Unrecognized benefit —beginning of period |  | $ | 2,162 |  |  | $ | 1,939 |  |  | $ | 1,667 |
Gross decreases —prior period tax positions |  |  | — |  |  |  | — |  |  |  | — |
Gross increases —current period tax positions |  |  | 203 |  |  |  | 223 |  |  |  | 272 |
Unrecognized benefit —end of period |  | $ | 2,365 |  |  | $ | 2,162 |  |  | $ | 1,939 |

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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=84230637&loc=d3e32639-109319 + 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=84230637&loc=d3e32687-109319 + Details
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