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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] | he aggregate changes in the total gross amount of unrecognized tax benefits are as follows:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Unrecognized tax benefits as of January 1 | $ | 815 |  |  | $ | 983 |  |  | $ | 2,487 |
Gross increase in unrecognized tax benefits - prior year tax positions | 52 |  |  | — |  |  | 168 |
Gross increase (decrease) in unrecognized tax benefits due to currency fluctuations - prior year tax positions | 43 |  |  | (131 | ) |  | (116 | )
Gross increase in unrecognized tax benefits - current year tax positions | 111 |  |  | 293 |  |  | 13 |
Settlements with taxing authorities | — |  |  | (330 | ) |  | (1,569 | )
Lapse of statute of limitations | (15 | ) |  | — |  |  | — |
Unrecognized tax benefits as of December 31 | $ | 1,006 |  |  | $ | 815 |  |  | $ | 983 |
Schedule of Components of Income Tax Expense (Benefit) | Income tax expense (benefit) for the years ended December 31, 2017, 2016, and 2015 attributable to (loss) income from operations is presented below.
| Current |  | Deferred |  | Total
Year ended December 31, 2017 |  |  |  |  |
Federal | $ | (41 | ) |  | $ | 6 |  |  | $ | (35 | )
State | 36 |  |  | — |  |  | 36 |
Foreign | 1,857 |  |  | (762 | ) |  | 1,095 |
| $ | 1,852 |  |  | $ | (756 | ) |  | $ | 1,096 |
Year ended December 31, 2016 |  |  |  |  |
Federal | $ | 227 |  |  | $ | 3,197 |  |  | $ | 3,424 |
State | 144 |  |  | 457 |  |  | 601 |
Foreign | 2,770 |  |  | (1,248 | ) |  | 1,522 |
| $ | 3,141 |  |  | $ | 2,406 |  |  | $ | 5,547 |
Year ended December 31, 2015 |  |  |  |  |
Federal | $ | (555 | ) |  | $ | (94 | ) |  | $ | (649 | )
State | 120 |  |  | 765 |  |  | 885 |
Foreign | 295 |  |  | (118 | ) |  | 177 |
| $ | (140 | ) |  | $ | 553 |  |  | $ | 413 |
Schedule of Effective Income Tax Rate Reconciliation | ctual income tax expense differs from the “expected” income tax (benefit) expense computed by applying the United States Federal statutory income tax rate of 34% to (loss) income before tax expense, as follows:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Income tax (benefit) expense at Federal statutory income tax rate | $ | (3,379 | ) |  | $ | (670 | ) |  | $ | 906 |
Increase (decrease) in income taxes resulting from: |  |  |  |  |
State income tax expense, net of federal benefit | 56 |  |  | (156 | ) |  | (37 | )
State research and development, investment credits | (435 | ) |  | (363 | ) |  | (317 | )
Non-deductible meals & entertainment | 47 |  |  | 49 |  |  | 33 |
Non-deductible stock compensation expense | 338 |  |  | 216 |  |  | 181 |
Non-deductible deferred compensation expense | — |  |  | 116 |  |  | 260 |
Subpart F income, net of foreign tax credits | 1,171 |  |  | 523 |  |  | 61 |
Foreign branch income | — |  |  | 52 |  |  | — |
Manufacturing deduction | — |  |  | — |  |  | (102 | )
Nontaxable interest income | — |  |  | (162 | ) |  | (106 | )
Foreign tax rate differential | (902 | ) |  | (1,258 | ) |  | (792 | )
Federal research and development credits | (427 | ) |  | (395 | ) |  | (348 | )
Uncertain tax positions | 189 |  |  | 283 |  |  | (413 | )
Provision to tax return adjustments | 8 |  |  | (95 | ) |  | 80 |
Change in tax rates | 926 |  |  | 14 |  |  | (313 | )
Change in valuation allowance | 3,330 |  |  | 7,425 |  |  | 1,392 |
Foreign research and development incentives | (22 | ) |  | (45 | ) |  | (59 | )
Other | 196 |  |  | 13 |  |  | (13 | )
Income tax expense | $ | 1,096 |  |  | $ | 5,547 |  |  | $ | 413 |
Schedule of Income before Income Tax, Domestic and Foreign | ncome before income tax expense determined by tax jurisdiction, are as follows:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
United States | $ | (13,271 | ) |  | $ | (7,775 | ) |  | $ | (570 | )
Foreign | 3,333 |  |  | 5,805 |  |  | 3,236 |
Total | $ | (9,938 | ) |  | $ | (1,970 | ) |  | $ | 2,666 |
Schedule of Deferred Tax Assets and Liabilities | eferred tax assets and liabilities for the periods presented consisted of the following:
| December 31,
| 2017 |  | 2016
Deferred tax assets: |  |  |
Accounts receivable, due to allowance for doubtful accounts | $ | 540 |  |  | $ | 1,104 |
Inventories | 581 |  |  | 792 |
Operating loss carry-forwards | 4,725 |  |  | 3,078 |
Stock-based compensation expense | 696 |  |  | 1,231 |
Property and equipment, due to difference in depreciation | 190 |  |  | 148 |
Research and development, alternative minimum tax credit carry-forwards | 4,338 |  |  | 3,031 |
Foreign tax credit carry-forwards | 2,958 |  |  | 754 |
State tax credit carry-forwards | 2,958 |  |  | 2,277 |
Warranty reserve | 495 |  |  | 822 |
Accrued expenses | 334 |  |  | 432 |
Gross deferred tax assets | 17,815 |  |  | 13,669 |
Less valuation allowance | (16,014 | ) |  | (11,567 | )
Total deferred tax assets | 1,801 |  |  | 2,102 |
Deferred tax liabilities: |  |  |
Purchased intangible assets | (2,705 | ) |  | (3,197 | )
Property and equipment, due to differences in depreciation | (1,681 | ) |  | (2,003 | )
Other | (29 | ) |  | (11 | )
Total deferred tax liabilities | (4,415 | ) |  | (5,211 | )
Net deferred tax liability | $ | (2,614 | ) |  | $ | (3,109 | )
Net deferred tax asset- non-current | $ | 20 |  |  | $ | 24 |
Net deferred tax liability- non-current | $ | (2,634 | ) |  | $ | (3,133 | )

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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://www.xbrl.org/2003/role/presentationRef -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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