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Summary Of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018 | Jan. 01, 2018
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |
Restricted cash | $ 100 |  | $ 100 |  | $ 100 |
Advertising Expense | 400 | $ 400 | 1,100 | $ 1,100 |  |
Revenue | 10,439 | 8,223 | 30,173 | 22,799 |  |
Cumulative effect of changes in accounting principle related to revenue recognition |  |  |  |  |  | $ 3,086
ASU 606 |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |
Cumulative effect of changes in accounting principle related to revenue recognition |  |  |  |  |  | $ 3,100
Janssen (SIMPONI) |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |
Revenue | 431 | 0 | 835 | 0 |  |
Shipping and Handling |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |
Cost of revenue | 400 | $ 300 | 1,100 | $ 900 |  |
Other assets |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |
Restricted cash | $ 100 |  | $ 100 |  |  |
IPO |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |
Deferred Offering Costs |  |  |  |  | $ 400 |

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