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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Taxes |
Schedule of income (loss) from continuing operations before income taxes |
|  | Year ended December 31, |
|  | 2017 |  | 2016 |  | 2015 |
|  | (in thousands) |
Domestic |  | $ | (96,809 | ) | $ | (123,021 | ) | $ | (53,553 | )
Foreign |  | 15,909 |  | 3,577 |  | 30,907 |
Total |  | $ | (80,900 | ) | $ | (119,444 | ) | $ | (22,646 | )
Schedule of components of the expense (benefit) for income taxes |
|  | Year ended December 31, |
|  | 2017 |  | 2016 |  | 2015 |
|  | (in thousands) |
Current: |  |  |  |  |  |  |
Federal |  | $ | — |  | $ | — |  | $ | 139 |
Foreign |  | (2,246 | ) | 1,937 |  | 6,952 |
State and local |  | 15 |  | (111 | ) | (407 | )
Total current expense (benefit) for income taxes |  | (2,231 | ) | 1,826 |  | 6,684 |
Deferred: |  |  |  |  |  |  |
Federal |  | (34,786 | ) | 1,459 |  | 2,104 |
Foreign |  | 1,652 |  | (646 | ) | 516 |
State and local |  | (742 | ) | 127 |  | 28 |
Total deferred expense (benefit) for income taxes |  | (33,876 | ) | 940 |  | 2,648 |
Total expense (benefit) for income taxes |  | $ | (36,107 | ) | $ | 2,766 |  | $ | 9,332 |
Schedule of reconciliation of the income tax expense computed using the Federal statutory rate to actual income tax provision |
|  | Year ended December 31, |
|  | 2017 |  | 2016 |  | 2015 |
|  | (in thousands) |
Income tax expense (benefit) at U.S. statutory rates |  | $ | (28,315 | ) | $ | (41,806 | ) | $ | (7,926 | )
State taxes, net of U.S. federal impact |  | (2,523 | ) | (1,963 | ) | (1,607 | )
Effect of international operations |  | 9,355 |  | 8,849 |  | (7,659 | )
Research and development tax credit |  | 620 |  | (801 | ) | (1,628 | )
Net change in valuation allowance |  | 1,342 |  | 50,520 |  | 23,655 |
Change in accrual for unrecognized tax benefits |  | (4,772 | ) | (1,700 | ) | 4,876 |
Subsidiary liquidation |  | — |  | (12,435 | ) | — |
Share-based compensation |  | 99 |  | 2,133 |  | — |
Effect of 2017 Tax Act |  | (11,344 | ) | — |  | — |
Worthless stock deduction |  | — |  | — |  | (2,069 | )
Change in entity tax status |  | — |  | — |  | 904 |
Other |  | (569 | ) | (31 | ) | 786 |
Total expense (benefit) for income taxes |  | $ | (36,107 | ) | $ | 2,766 |  | $ | 9,332 |
Schedule of deferred tax assets and liabilities |
|  | December 31, |
|  | 2017 |  | 2016 |
|  | (in thousands) |
Deferred tax assets: |  |  |  |  |
Inventory valuation |  | $ | 8,007 |  | $ | 6,681 |
Net operating losses |  | 73,458 |  | 54,527 |
Credit carry forwards |  | 34,966 |  | 24,598 |
Warranty and installation accruals |  | 1,690 |  | 1,757 |
Share-based compensation |  | 7,385 |  | 12,624 |
Other |  | 1,966 |  | 6,778 |
Total deferred tax assets |  | 127,472 |  | 106,965 |
Valuation allowance |  | (100,684 | ) | (106,793 | )
Net deferred tax assets |  | 26,788 |  | 172 |
Deferred tax liabilities: |  |  |  |  |
Purchased intangible assets |  | 45,807 |  | 11,071 |
Undistributed earnings |  | — |  | 186 |
Convertible Senior Notes |  | 13,534 |  | — |
Depreciation |  | 1,339 |  | 69 |
Total deferred tax liabilities |  | 60,680 |  | 11,326 |
Net deferred taxes |  | $ | (33,892 | ) | $ | (11,154 | )
Schedule of reconciliation of beginning and ending amount of uncertain tax positions |
|  | December 31, |
|  | 2017 |  | 2016 |  | 2015 |
|  | (in thousands) |
Balance at beginning of year |  | $ | 7,452 |  | $ | 9,152 |  | $ | 4,276 |
Additions for tax positions related to current year |  | 511 |  | 1,038 |  | 5,596 |
Additions for tax positions related to prior years |  | 3 |  | 233 |  | 143 |
Reductions for tax positions related to prior years |  | (4,877 | ) | (2,826 | ) | — |
Reductions due to the lapse of the statute of limitations |  | (122 | ) | (39 | ) | (642 | )
Settlements |  | (287 | ) | (106 | ) | (221 | )
Additions for business combination |  | 5,589 |  | — |  | — |
Balance at end of year |  | $ | 8,269 |  | $ | 7,452 |  | $ | 9,152 |

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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=65882285&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: 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=65882285&loc=d3e32718-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32840-109319 + Details
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