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Summary of Significant Accounting Policies - Narrative (Details) |  | 12 Months Ended
--- | --- | ---
Feb. 01, 2019 | Dec. 31, 2019 USD ($) unit shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |
Number of reporting units | unit |  | 1 |  |
Impairment of goodwill |  | $ 0 | $ 0 | $ 0
Impairment of intangible assets |  | 0 | 0 | $ 0
Revenues |  | 34,925,000 | 0 |
Accrued volume-based rebate and coupon liability |  | 1,709,000 | 0 |
Accrued volume-based rebate and coupon liability, current |  | 5,229,000 | 2,577,000 |
Provisions for rebate and coupon programs |  | 12,325,000 | 0 |
Payments for accrued rebates and coupon liabilities |  | 10,616,000 |  |
Allowance for doubtful accounts |  | 387,000 |  |
Provision for bad debts |  | 387,000 | 0 |
Write-offs of allowance for doubtful accounts |  | 0 |  |
Advertising costs |  | $ 1,407,000 | $ 0 |
Distribution right |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Useful lives of intangible assets | 20 years | 20 years |  |
Software development |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Useful lives of intangible assets |  | 2 years |  |
Options |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Securities excluded from the computation of diluted net loss per share (in shares) | shares |  | 3,977,401 | 3,257,801 |
RSUs |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Securities excluded from the computation of diluted net loss per share (in shares) | shares |  | 179,758 | 221,292 |
Service revenue |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Revenues |  | $ 688,000 | $ 0 |
Geographic Concentration Risk | Revenue From Contract with Customer Benchmark | Service revenue | CANADA |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Revenues |  | $ 688,000 |  |

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