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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 28, 2021 USD ($) shares | Feb. 18, 2021 USD ($) | Feb. 01, 2019 | Apr. 30, 2021 USD ($) | Mar. 31, 2022 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) reporting_unit shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  |  |  |  |  | 5 years |  |
Settlement payment from daewoong |  |  |  | $ 25,500,000 |  |  | $ 25,500,000 |  |
Number of reporting units | reporting_unit |  |  |  |  |  |  | 1 |  |
Impairment of goodwill |  |  |  |  |  |  | $ 0 | $ 0 | $ 0
Impairment of intangible assets |  |  |  |  |  |  | 0 | 0 | $ 0
Revenues |  |  |  |  |  |  | 99,673,000 | 56,540,000 |
Accrued revenue contract liabilities |  |  |  |  |  |  | 7,934,000 | 3,081,000 |
Rebates and coupons, credits and payments |  |  |  |  |  |  | 16,139,000 | 16,896,000 |
Payments for provisions for accrued volume-based rebate and coupon liability |  |  |  |  |  |  | 11,286,000 | 15,524,000 |
Contract with customer, liability, revenue recognized |  |  |  |  |  |  | 2,802,000 | 0 |
Loss contingency accrual |  |  |  |  |  |  | 0 | 0 |
Litigation settlement expenses |  |  |  |  |  |  | 0 | 83,421,000 |
Payments for legal settlements |  |  |  |  |  |  |  | 48,421,000 |
Accrued litigation settlement |  |  |  |  |  |  | 15,000,000 | 63,421,000 |
Accrued litigation settlement |  |  |  |  |  |  | 5,000,000 | 20,000,000 |
Advertising costs |  |  |  |  |  |  | 16,391,000 | 4,979,000 |
Allowance for doubtful accounts |  |  |  |  |  |  | 2,385,000 | 2,118,000 |
Provision for bad debts |  |  |  |  |  |  | 589,000 | 2,066,000 |
Allowance for credit loss, writeoff |  |  |  |  |  |  | $ 322,000 | $ 335,000 |
Common Stock |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Issuance of common stock in connection with litigation settlement (in shares) | shares | 6,762,652 |  |  |  |  |  |  |  |
Common stock options |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Securities excluded from the computation of diluted net loss per share (in shares) | shares |  |  |  |  |  |  | 3,922,286 | 4,407,498 |
RSUs |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Securities excluded from the computation of diluted net loss per share (in shares) | shares |  |  |  |  |  |  | 1,926,467 | 1,173,741 |
Convertible Debt Securities |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Securities excluded from the computation of diluted net loss per share (in shares) | shares |  |  |  |  |  |  | 0 | 3,076,923 |
Intellectual Property Disputes, Jeuveau |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Loss contingency accrual | $ 35,000,000 | $ 35,000,000 |  |  |  |  |  | $ 35,000,000 |
Settlement agreement, payment terms (in years) |  | 2 years |  |  |  |  |  |  |
Loss contingency accrual, payments |  |  |  |  |  | $ 15,000 |  |  |
Payments for legal settlements |  |  |  |  |  | $ 15,000,000 | $ 15,000,000 |  |
Intellectual Property Disputes, Jeuveau | Subsequent Event |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Loss contingency accrual, payments |  |  |  |  | $ 15,000 |  |  |  |
Payments for legal settlements |  |  |  |  | $ 15,000 |  |  |  |
Service revenue |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  | 702,000 | 738,000 |
Service revenue | CANADA |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  | $ 702,000 | $ 738,000 |
Distribution right |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Useful lives of intangible assets |  |  | 20 years |  |  |  | 20 years | 20 years |
Software development |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Useful lives of intangible assets |  |  |  |  |  |  | 2 years |  |

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