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Akcea Merger (Tables) | 12 Months Ended
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Dec. 31, 2021
Akcea Merger [Abstract] |
Akcea Merger | The following table summarizes the severance and retention expenses related to the Akcea Merger that we recognized for the periods indicated (in millions):
|  | Year Ended December 31, 2021 |  |  | Year Ended December 31, 2020 |
R&D expenses |  | $ | 5.1 |  |  | $ | 3.9 |
SG&A expenses |  |  | 6.6 |  |  |  | 11.4 |
Total |  | $ | 11.7 |  |  | $ | 15.3 |
The following table summarizes the severance and retention reserve amounts related to the Akcea Merger that we included in accrued compensation for the period indicated (in millions):
|  | Year Ended December 31, 2021 |
Beginning balance as of January 1, 2021 |  | $ | 14.7 |
Amount expensed during the year |  |  | 13.5 |
Reserve adjustments during the year |  |  | (1.8 | )
Net amount expensed during the year |  |  | 11.7 |
Amounts paid during the year |  |  | (26.4 | )
Ending balance as of December 31, 2021 |  | $ | — |

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- Definition The tabular disclosure of the effects of any changes in a parent's ownership interest in a subsidiary on the equity attributable to the parent if the ownership interests in a subsidiary changes during the period. The changes represented by this element did not result in the deconsolidation of the subsidiary. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=120409616&loc=SL4591554-111686 + Details
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