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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) | Income tax expense for the years ended December 31, 2019 and 2018 attributable to loss from operations is presented below.
| Current |  | Deferred |  | Total
Year ended December 31, 2019 |  |  |  |  |
Federal | $ | (196 | ) |  | $ | (4,741 | ) |  | $ | (4,937 | )
State | (28 | ) |  | (29 | ) |  | (57 | )
Foreign | 1,143 |  |  | (152 | ) |  | 991 |
| $ | 919 |  |  | $ | (4,922 | ) |  | $ | (4,003 | )
Year ended December 31, 2018 |  |  |  |  |
Federal | $ | (3 | ) |  | $ | (12 | ) |  | $ | (15 | )
State | (59 | ) |  | (4 | ) |  | (63 | )
Foreign | 596 |  |  | (172 | ) |  | 424 |
| $ | 534 |  |  | $ | (188 | ) |  | $ | 346 |
Schedule of Effective Income Tax Rate Reconciliation | Actual income tax expense differs from the “expected” income tax benefit computed by applying the United States Federal statutory income tax rate of 21% for both 2019 and 2018 to loss before tax expense, as follows:
| Year Ended December 31,
| 2019 |  | 2018
Income tax benefit at Federal statutory income tax rate | $ | (4,203 | ) |  | $ | (2,314 | )
(Decrease) increase in income taxes resulting from: |  |  |
State income tax (benefit) expense, net of federal benefit | (610 | ) |  | 172 |
State research and development, investment credits | 71 |  |  | (397 | )
Non-deductible meals & entertainment | 36 |  |  | 26 |
Non-deductible stock compensation expense | 18 |  |  | 6 |
GILTI | — |  |  | 577 |
Nontaxable interest income | — |  |  | 2 |
Foreign tax rate differential | (4 | ) |  | (22 | )
Federal research and development credits | (490 | ) |  | (378 | )
Uncertain tax positions | (110 | ) |  | 53 |
Provision to tax return adjustments | 21 |  |  | 513 |
Change in tax rates | — |  |  | (3 | )
Change in valuation allowance | 934 |  |  | 2,127 |
Foreign research and development incentives | — |  |  | (5 | )
Loss on legal entity dissolution | 244 |  |  | — |
Other | 90 |  |  | (11 | )
Income tax (benefit) expense | $ | (4,003 | ) |  | $ | 346 |
Schedule of Loss before Income Tax, Domestic and Foreign | Loss from continuing operations before income tax (benefit) expense determined by tax jurisdiction, are as follows:
| Year Ended December 31,
| 2019 |  | 2018
United States | $ | (22,452 | ) |  | $ | (12,828 | )
Foreign | 2,440 |  |  | 1,730 |
Total | $ | (20,012 | ) |  | $ | (11,098 | )
Schedule of Deferred Tax Assets and Liabilities | Deferred tax assets and liabilities for the periods presented consisted of the following:
| December 31,
| 2019 |  | 2018
Deferred tax assets: |  |  |
Accounts receivable, due to allowance for doubtful accounts | $ | 373 |  |  | $ | 577 |
Inventories | 776 |  |  | 718 |
Operating loss carry-forwards | 1,343 |  |  | 3,064 |
Stock-based compensation expense | 807 |  |  | 762 |
Property and equipment, due to difference in depreciation | 47 |  |  | 53 |
Research and development, alternative minimum tax credit carry-forwards | 5,243 |  |  | 4,716 |
Foreign tax credit carry-forwards | 2,345 |  |  | 2,360 |
State tax credit carry-forwards | 3,146 |  |  | 2,977 |
Capitalized research and development | 3,263 |  |  | 3,130 |
Warranty reserve | 523 |  |  | 454 |
Accrued expenses | 845 |  |  | 556 |
Right of use assets | 1,378 |  |  | — |
Gross deferred tax assets | 20,089 |  |  | 19,367 |
Less valuation allowance | (18,452 | ) |  | (18,144 | )
Total deferred tax assets | 1,637 |  |  | 1,223 |
Deferred tax liabilities: |  |  |
Purchased intangible assets | (844 | ) |  | (951 | )
Property and equipment, due to differences in depreciation | (132 | ) |  | (994 | )
Lease liability | (1,378 | ) |  | — |
Other | — |  |  | (18 | )
Total deferred tax liabilities | (2,354 | ) |  | (1,963 | )
Net deferred tax liability | $ | (717 | ) |  | $ | (740 | )
Non-current deferred income tax asset | $ | 45 |  |  | $ | 226 |
Non-current deferred income tax liability | $ | (762 | ) |  | $ | (966 | )
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] | The aggregate changes in the total gross amount of unrecognized tax benefits are as follows:
| Year Ended December 31,
| 2019 |  | 2018
Unrecognized tax benefits as of January 1 | $ | 494 |  |  | $ | 469 |
Gross increase in unrecognized tax benefits - prior year tax positions | 1,524 |  |  | — |
Gross increase in unrecognized tax benefits - current year tax positions | 78 |  |  | 75 |
Lapse of statute of limitations | (199 | ) |  | (50 | )
Unrecognized tax benefits as of December 31 | $ | 1,897 |  |  | $ | 494 |

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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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- 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://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Tabular disclosure of unrecognized tax benefits for which a material change is reasonably possible in the next twelve months, typically including the nature of the uncertainty, the event(s) that could cause a material change, and an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made. An unrecognized tax benefit is the difference between a tax position taken in a tax return and the amounts recognized in the financial statements for which it is more likely than not, based on the technical merits of the position, that the tax position will not be sustained upon examination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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