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Note 12 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | Year ended December 31, |
|  | 2018 |  |  | 2017 |
Domestic |  | $ | (7,751 | ) |  | $ | (12,630 | )
Foreign |  |  | (2,496 | ) |  |  | (3,263 | )
Total |  | $ | (10,247 | ) |  | $ | (15,893 | )
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | Year ended December 31, |
|  | 2018 |  |  | 2017 |
Current: |  |  |  |  |  |  |  |
Federal |  | $ | (71 | ) |  | $ | 577 |
State |  |  | 37 |  |  |  | (66 | )
Foreign |  |  | 117 |  |  |  | (682 | )
Total current |  |  | 83 |  |  |  | (171 | )
Deferred: |  |  |  |  |  |  |  |
Federal |  |  | 2,233 |  |  |  | 1,497 |
State |  |  | 667 |  |  |  | 480 |
Foreign |  |  | 495 |  |  |  | 748 |
Total |  |  | 3,395 |  |  |  | 2,725 |
Change in valuation allowance |  |  | (9,918 | ) |  |  | (833 | )
Total deferred |  |  | (6,523 | ) |  |  | 1,892 |
Benefit/(provision) for income taxes |  | $ | (6,440 | ) |  | $ | 1,721 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | Year ended December 31, |
|  | 2018 |  |  | 2017 |
Tax benefit (provision) at federal statutory rate |  | $ | 2,152 |  |  | $ | 5,403 |
State income tax benefit (provision), net of federal benefit |  |  | 413 |  |  |  | 439 |
Research and development tax credits |  |  | 250 |  |  |  | 411 |
Subpart F inclusion |  |  | — |  |  |  | (370 | )
Foreign earnings or losses taxed at different rates |  |  | 12 |  |  |  | (540 | )
Tax rate change |  |  | 23 |  |  |  | (3,161 | )
Other |  |  | 628 |  |  |  | 372 |
Change in valuation allowance |  |  | (9,918 | ) |  |  | (833 | )
Tax benefit (provision) |  | $ | (6,440 | ) |  | $ | 1,721 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2018 |  |  | 2017 |
Deferred revenue |  | $ | 50 |  |  | $ | 738 |
Basis difference in intangible assets |  |  | 3,283 |  |  |  | 3,403 |
Inventory reserve |  |  | 2,235 |  |  |  | 2,089 |
Net operating loss carryforwards |  |  | 4,067 |  |  |  | 1,627 |
Research and development tax credits |  |  | 794 |  |  |  | 163 |
Accrued expenses |  |  | 143 |  |  |  | 75 |
Stock-based compensation |  |  | 362 |  |  |  | 327 |
Allowance for sales returns and doubtful accounts |  |  | 160 |  |  |  | 119 |
Difference in property and equipment basis |  |  | (185 | ) |  |  | (212 | )
Other |  |  | 551 |  |  |  | 438 |
Total net deferred income tax asset |  |  | 11,460 |  |  |  | 8,767 |
Less: Valuation allowance |  |  | (11,460 | ) |  |  | (2,236 | )
Net deferred income tax asset (liability) |  | $ | — |  |  | $ | 6,531 |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | Year ended December 31, |
|  | 2018 |  |  | 2017 |
Balance - beginning of year |  | $ | 652 |  |  | $ | 1,189 |
Additions based on tax positions related to the current year |  |  | 58 |  |  |  | 67 |
Additions for tax positions of prior years |  |  | 118 |  |  |  | 520 |
Reductions for tax positions of prior years |  |  | (53 | ) |  |  | - |
Settlements |  |  | - |  |  |  | (165 | )
Lapse in statutes of limitations |  |  | (96 | ) |  |  | (959 | )
Uncertain tax positions, ending balance |  | $ | 679 |  |  | $ | 652 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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