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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of Amount of Net Loss Before Taxes | The amount of net loss before taxes for the years ended December 31, 2019, 2018, and 2017 is as follows:
|  | December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
U.S. loss before taxes |  | $ | 138,342 |  |  | $ | 116,920 |  |  | $ | 6,771 |
Foreign loss before taxes |  |  | 41,965 |  |  |  | 30,049 |  |  |  | — |
Loss before income taxes |  |  | 180,307 |  |  |  | 146,969 |  |  |  | 6,771 |
Schedule of Reconciliation of Income Tax Expense | A reconciliation of income tax expense for the years ended December 31, 2019, 2018, and 2017 is as follows:
|  | December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |  |  | $ | — |
State |  |  | — |  |  |  | — |  |  |  | — |
Foreign |  |  | — |  |  |  | — |  |  |  | — |
Total current income tax expense |  |  | — |  |  |  | — |  |  |  | — |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |  |  | $ | — |
State |  |  | — |  |  |  | — |  |  |  | — |
Foreign |  |  | — |  |  |  | — |  |  |  | — |
Total deferred income tax expense |  |  | — |  |  |  | — |  |  |  | — |
Total income tax expense |  | $ | — |  |  | $ | — |  |  | $ | — |
Schedule of Deferred Tax Assets and Liabilities | Significant components of the Company’s deferred tax assets and liabilities at December 31, 2019, 2018 and 2017 are shown below.
|  | December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
Deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |
Net operating losses |  | $ | 43,626 |  |  | $ | 14,442 |  |  | $ | 306 |
Tax credits, net |  |  | 9,196 |  |  |  | 1,131 |  |  |  | — |
Amortization |  |  | 6,597 |  |  |  | 6,267 |  |  |  | 1,588 |
Lease liability |  |  | 2,329 |  |  |  | — |  |  |  | — |
Accrued compensation |  |  | 1,476 |  |  |  | 834 |  |  |  | — |
Stock-based compensation |  |  | 1,388 |  |  |  | — |  |  |  | 1 |
Other |  |  | 383 |  |  |  | 154 |  |  |  | — |
Total gross deferred tax assets |  |  | 64,995 |  |  |  | 22,828 |  |  |  | 1,895 |
Deferred tax liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Right of use asset |  |  | (2,164 | ) |  |  | — |  |  |  | — |
Property, plant and equipment |  |  | (57 | ) |  |  | (16 | ) |  |  | — |
Stock-based compensation |  |  | — |  |  |  | (1,057 | ) |  |  | — |
Total gross deferred tax liabilities |  |  | (2,221 | ) |  |  | (1,073 | ) |  |  | — |
Valuation allowance |  |  | (62,774 | ) |  |  | (21,755 | ) |  |  | (1,895 | )
Net deferred tax asset |  | $ | — |  |  | $ | — |  |  | $ | — |
Reconciliation of the Federal Statutory Income Tax Rate to Effective Income Tax Rate | A reconciliation of the federal statutory income tax rate to the Company’s effective income tax rate is as follows:
|  | December 31,
|  | 2019 |  | 2018 |  | 2017
Federal statutory income tax rate |  | 21.00% |  | 21.00% |  | 34.00%
State income taxes, net of federal benefit |  | —% |  | —% |  | 5.73%
Change in valuation allowance |  | (22.12%) |  | (13.17%) |  | (27.97%)
Change in tax law |  | —% |  | —% |  | (11.85%)
Research and experimentation credits |  | 3.81% |  | 0.77% |  | —%
Foreign rate differential |  | (1.84%) |  | (1.74%) |  | —%
Stock-based compensation |  | —% |  | (2.60%) |  | —%
In process research and development |  | —% |  | (3.92%) |  | —%
Other |  | (0.85%) |  | (0.34%) |  | 0.09%
Provision for income taxes |  | —% |  | —% |  | —%
Schedule of Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits, Excluding Interest and Penalties | A reconciliation of the beginning and ending amount of unrecognized tax benefits for 2019, 2018, and 2017, excluding interest and penalties, is as follows:
|  | December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (in thousands) |
Balance at beginning of the year |  | $ | 408 |  |  | $ | — |  |  | $ | — |
Increase related to current year positions |  |  | 2,346 |  |  |  | 408 |  |  |  | — |
Balance at the end of the year |  | $ | 2,754 |  |  | $ | 408 |  |  | $ | — |

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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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