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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of components of income tax provision (benefit) | Components of the income tax (benefit) expense are as follows (in thousands):
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
Current: |  |  |  |  |
Federal | $ | — |  |  | $ | (1,126 | ) |  | $ | (3,325 | )
State | 97 |  |  | 587 |  |  | (126 | )
Foreign | (740 | ) |  | 488 |  |  | (526 | )
Total current | (643 | ) |  | (51 | ) |  | (3,977 | )
Deferred: |  |  |  |  |
Federal | (6,585 | ) |  | 5,994 |  |  | 1,904 |
State | (89 | ) |  | 214 |  |  | (85 | )
Foreign | 101 |  |  | (45 | ) |  | (46 | )
Total deferred | (6,573 | ) |  | 6,163 |  |  | 1,773 |
Income tax (benefit) expense | $ | (7,216 | ) |  | $ | 6,112 |  |  | $ | (2,204 | )
Schedule of domestic and foreign net income (loss) before taxes | The components of (loss) income before income taxes are as follows (in thousands):
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
United States | $ | (80,034 | ) |  | $ | (10,025 | ) |  | $ | (5,292 | )
Foreign | (623 | ) |  | (1,367 | ) |  | (1,359 | )
(Loss) income before income taxes | $ | (80,657 | ) |  | $ | (11,392 | ) |  | $ | (6,651 | )
Schedule of effective income tax rate reconciliation | A reconciliation of the U.S. federal statutory tax rate to the effective income tax rate is as follows:
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
Federal statutory tax rate | 21.0 | % |  | 35.0 | % |  | 35.0 | %
State income taxes, net of federal benefit | 0.8 |  |  | (3.2 | ) |  | 2.5 |
Non-U.S. income taxed at different rates | 0.8 |  |  | (4.3 | ) |  | (0.6 | )
(Increase) decrease in valuation allowance | (3.6 | ) |  | 0.1 |  |  | (0.2 | )
Impact of 2017 Tax Cuts and Jobs Act | — |  |  | (64.2 | ) |  | — |
Net operating loss carryback adjustment | — |  |  | — |  |  | (4.7 | )
Reduction in tax benefit related to stock-based awards | (1.0 | ) |  | (16.9 | ) |  | — |
Non-deductible expenditures and goodwill | (9.0 | ) |  | (3.9 | ) |  | (6.1 | )
Research and development credit | 0.3 |  |  | 3.6 |  |  | 5.7 |
Other | (0.4 | ) |  | 0.1 |  |  | 1.5 |
Effective income tax rate | 8.9 | % |  | (53.7 | )% |  | 33.1 | %
Schedule of deferred tax assets and liabilities | The components of deferred tax assets and liabilities are as follows (in thousands):
| December 31,
| 2018 |  | 2017
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ | 30,241 |  |  | $ | 24,569 |
Allowance for doubtful accounts | 1,073 |  |  | 981 |
Inventory valuation reserves | 1,057 |  |  | 827 |
Equity compensation | 548 |  |  | 685 |
Goodwill | 1,089 |  |  | — |
Accrued compensation | 342 |  |  | 222 |
Foreign tax credit carryforward | 4,041 |  |  | 3,955 |
Interest expense limitation | 534 |  |  | — |
Other | 50 |  |  | — |
Total gross deferred tax assets | 38,975 |  |  | 31,239 |
Valuation allowance | (4,042 | ) |  | (1,187 | )
Total deferred tax assets, net | 34,933 |  |  | 30,052 |
Deferred tax liabilities: |  |  |
Property and equipment | (6,613 | ) |  | (6,216 | )
Intangible assets | (9,657 | ) |  | (10,084 | )
Goodwill | — |  |  | (365 | )
Convertible debt | — |  |  | (619 | )
Unearned revenue | — |  |  | (52 | )
Prepaid insurance and other | — |  |  | (3 | )
Total gross deferred tax liabilities | (16,270 | ) |  | (17,339 | )
Net deferred tax assets | $ | 18,663 |  |  | $ | 12,713 |

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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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