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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pay vs Performance Disclosure [Table] |  |  |
Pay vs Performance [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Value of Initial Fixed $100 Investment Based on: | ​ | ​ | ​ | ​
Year | ​ | Summary Compensation Table Total for PEO (1) | ​ | Compensation Actually Paid to PEO (2) | ​ | Average Summary Compensation Table Total for Non-PEO NEOs (3) | ​ | Average Compensation Actually Paid to Non-PEO NEOs (3) | ​ | Coherus Total Shareholder Return (TSR) (4) | ​ | Peer Group TSR (5) | ​ | Net Income (Loss) | ​ | Net Product Revenue (Company-Selected Measure) (6)
(a) | ​ | (b)($) | ​ | (c)($) | ​ | (d)($) | ​ | (e)($) | ​ | (f)($) | ​ | (g)($) | ​ | (h)($ in 000's) | ​ | (i)($ in 000's)
2022 | ​ | 6,866,396 | ​ | 212,826 | ​ | 2,122,124 | ​ | 470,265 | ​ | (56) | ​ | 11 | ​ | (291,754) | ​ | 210,760
2021 | ​ | 8,594,495 | ​ | 6,461,745 | ​ | 2,449,597 | ​ | 2,031,913 | ​ | (11) | ​ | 25 | ​ | (287,100) | ​ | 326,509
2020 | ​ | 7,278,761 | ​ | 8,381,980 | ​ | 2,035,344 | ​ | 2,408,072 | ​ | (3) | ​ | 26 | ​ | 132,244 | ​ | 475,824
​
(1) | Represents total compensation paid to the principal executive officer, or PEO, Mr. Dennis Lanfear, as reflected in the Summary Compensation Table.
​
(2) | The following table sets forth the adjustments made during each year presented to arrive at CAP to our PEO during each year:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | ($) | ​ | ($) | ​ | ($)
Summary Compensation Table (SCT) Total Compensation | ​ | 6,866,396 | ​ | 8,594,495 | ​ | 7,278,761
Deduct for amounts reported under the "Stock Awards" and "Option Awards" in the SCT | ​ | (5,071,908) | ​ | (6,730,275) | ​ | (5,454,150)
Fair value as of year-end of equity awards granted during the year that remain unvested | ​ | 1,795,132 | ​ | 3,351,633 | ​ | 3,953,739
Change in fair value of prior years' equity awards that remain unvested as of year-end | ​ | (2,186,702) | ​ | (576,558) | ​ | 1,510,655
Fair value on vesting date for awards granted and vested in the same year | ​ | 433,008 | ​ | 2,291,315 | ​ | 1,275,275
Change in fair value from prior year-end to vesting date of prior years' awards that vested during year | ​ | (1,623,100) | ​ | (468,865) | ​ | (182,300)
Compensation Actually Paid (CAP) | ​ | 212,826 | ​ | 6,461,745 | ​ | 8,381,980
​ ​
(3) | The following table sets forth the adjustments made during each year presented to arrive at CAP to our non-PEO NEOs during each year:
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | ($) | ​ | ($) | ​ | ($)
Average SCT Total for Non-PEO NEOs | ​ | 2,122,124 | ​ | 2,449,597 | ​ | 2,035,344
Deduct for amounts reported under the "Stock Awards" and "Option Awards" in the SCT | ​ | (1,372,424) | ​ | (1,829,098) | ​ | (1,235,831)
Fair value as of year-end of equity awards granted during the year that remain unvested | ​ | 537,826 | ​ | 1,286,137 | ​ | 1,037,351
Change in fair value of prior years' equity awards that remain unvested as of year-end | ​ | (550,147) | ​ | (108,942) | ​ | 439,657
Fair value on vesting date for awards granted and vested in the same year | ​ | 86,062 | ​ | 294,903 | ​ | 159,400
Change in fair value from prior year-end to vesting date of prior years' awards that vested during year | ​ | (353,176) | ​ | (60,684) | ​ | (27,849)
Average CAP to Non-PEO NEOs | ​ | 470,265 | ​ | 2,031,913 | ​ | 2,408,072
​ The non-PEO NEOs included in average compensation shown in columns (d) and (e) above are as follows:
2022 |  | 2021 |  | 2020
McDavid Stilwell |  | Jean-Frederic Viret |  | Jean-Frederic Viret
Vladimir Vexler, Ph.D. |  | McDavid Stilwell |  | Vincent Anicetti
|  | Vincent Anicetti |  | Vladimir Vexler, Ph.D.
|  | Vladimir Vexler, Ph.D. |  |
​ ​
(4) | Total Shareholder Return, or TSR, represents the cumulative growth of a hypothetical $100 investment in the Company made as of December 31, 2019, reflected as of the end of each respective year.
​
(5) | Peer group TSR represents the cumulative growth of a hypothetical $100 investment made as of December 31, 2019 in the Nasdaq Biotechnology Index, which we also use for purposes of the stock performance graph included in our Annual Report for the year ended December 31, 2022, reflected as of the end of each respective year.
​
(6) | SEC rules require us to designate a “company-selected measure” that in our assessment represents the most important financial performance measure (that is not TSR or net income) used by the Company to link the CAP of our NEOs, for the most recently completed fiscal year, to our performance. We selected Net Product Revenue as this measure for 2022 as reflected in column (i) in the first table above. Net product revenue is a Generally Accepted Accounting Principle measure reported in the Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. This performance measure may not have been the most important financial performance measure for years 2021 and 2020 and we may determine a different financial performance measure to be the most important financial performance measure in future years.
Company Selected Measure Name | Net Product Revenue |  |
Named Executive Officers, Footnote [Text Block] |
(1) | Represents total compensation paid to the principal executive officer, or PEO, Mr. Dennis Lanfear, as reflected in the Summary Compensation Table.
The non-PEO NEOs included in average compensation shown in columns (d) and (e) above are as follows:
2022 |  | 2021 |  | 2020
McDavid Stilwell |  | Jean-Frederic Viret |  | Jean-Frederic Viret
Vladimir Vexler, Ph.D. |  | McDavid Stilwell |  | Vincent Anicetti
|  | Vincent Anicetti |  | Vladimir Vexler, Ph.D.
|  | Vladimir Vexler, Ph.D. |  |
​ |  |
Peer Group Issuers, Footnote [Text Block] | ​
(5) | Peer group TSR represents the cumulative growth of a hypothetical $100 investment made as of December 31, 2019 in the Nasdaq Biotechnology Index, which we also use for purposes of the stock performance graph included in our Annual Report for the year ended December 31, 2022, reflected as of the end of each respective year.
PEO Total Compensation Amount | $ 6,866,396 | $ 8,594,495 | $ 7,278,761
PEO Actually Paid Compensation Amount | $ 212,826 | 6,461,745 | 8,381,980
Adjustment To PEO Compensation, Footnote [Text Block] | ​
(2) | The following table sets forth the adjustments made during each year presented to arrive at CAP to our PEO during each year:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | ($) | ​ | ($) | ​ | ($)
Summary Compensation Table (SCT) Total Compensation | ​ | 6,866,396 | ​ | 8,594,495 | ​ | 7,278,761
Deduct for amounts reported under the "Stock Awards" and "Option Awards" in the SCT | ​ | (5,071,908) | ​ | (6,730,275) | ​ | (5,454,150)
Fair value as of year-end of equity awards granted during the year that remain unvested | ​ | 1,795,132 | ​ | 3,351,633 | ​ | 3,953,739
Change in fair value of prior years' equity awards that remain unvested as of year-end | ​ | (2,186,702) | ​ | (576,558) | ​ | 1,510,655
Fair value on vesting date for awards granted and vested in the same year | ​ | 433,008 | ​ | 2,291,315 | ​ | 1,275,275
Change in fair value from prior year-end to vesting date of prior years' awards that vested during year | ​ | (1,623,100) | ​ | (468,865) | ​ | (182,300)
Compensation Actually Paid (CAP) | ​ | 212,826 | ​ | 6,461,745 | ​ | 8,381,980
​ |  |
Non-PEO NEO Average Total Compensation Amount | $ 2,122,124 | 2,449,597 | 2,035,344
Non-PEO NEO Average Compensation Actually Paid Amount | $ 470,265 | 2,031,913 | 2,408,072
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] |
(3) | The following table sets forth the adjustments made during each year presented to arrive at CAP to our non-PEO NEOs during each year:
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | ($) | ​ | ($) | ​ | ($)
Average SCT Total for Non-PEO NEOs | ​ | 2,122,124 | ​ | 2,449,597 | ​ | 2,035,344
Deduct for amounts reported under the "Stock Awards" and "Option Awards" in the SCT | ​ | (1,372,424) | ​ | (1,829,098) | ​ | (1,235,831)
Fair value as of year-end of equity awards granted during the year that remain unvested | ​ | 537,826 | ​ | 1,286,137 | ​ | 1,037,351
Change in fair value of prior years' equity awards that remain unvested as of year-end | ​ | (550,147) | ​ | (108,942) | ​ | 439,657
Fair value on vesting date for awards granted and vested in the same year | ​ | 86,062 | ​ | 294,903 | ​ | 159,400
Change in fair value from prior year-end to vesting date of prior years' awards that vested during year | ​ | (353,176) | ​ | (60,684) | ​ | (27,849)
Average CAP to Non-PEO NEOs | ​ | 470,265 | ​ | 2,031,913 | ​ | 2,408,072
​ |  |
Compensation Actually Paid vs. Total Shareholder Return [Text Block] | ​ |  |
Compensation Actually Paid vs. Net Income [Text Block] | ​ |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] |  |  |
Total Shareholder Return Vs Peer Group [Text Block] | ​ ​ |  |
Tabular List [Table Text Block] | ​ FINANCIAL PERFORMANCE MEASURE ​ The following financial performance measure represents the most important financial measure used to link compensation actually paid to the NEOs for 2022 to Company performance: Net Product Revenue. ​ |  |
Total Shareholder Return Amount | $ (56) | (11) | (3)
Peer Group Total Shareholder Return Amount | 11 | 25 | 26
Net Income (Loss) | $ (291,754,000) | $ (287,100,000) | $ 132,244,000
Company Selected Measure Amount | 210,760,000 | 326,509,000 | 475,824,000
PEO Name | Mr. Dennis Lanfear |  |
Measure [Axis]: 1 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Net Product Revenue |  |
Non-GAAP Measure Description [Text Block] | ​
(6) | SEC rules require us to designate a “company-selected measure” that in our assessment represents the most important financial performance measure (that is not TSR or net income) used by the Company to link the CAP of our NEOs, for the most recently completed fiscal year, to our performance. We selected Net Product Revenue as this measure for 2022 as reflected in column (i) in the first table above. Net product revenue is a Generally Accepted Accounting Principle measure reported in the Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. This performance measure may not have been the most important financial performance measure for years 2021 and 2020 and we may determine a different financial performance measure to be the most important financial performance measure in future years.
PEO [Member] | Deduct for amounts reported under the "Stock Awards" and Option Awards" in the SCT |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ (5,071,908) | $ (6,730,275) | $ (5,454,150)
PEO [Member] | Fair value as of year-end of equity awards granted during the year that remain unvested |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 1,795,132 | 3,351,633 | 3,953,739
PEO [Member] | Change in fair value of prior years' equity awards that remain unvested as of year-end |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (2,186,702) | (576,558) | 1,510,655
PEO [Member] | Fair value on vesting date for awards granted and vested in the same year |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 433,008 | 2,291,315 | 1,275,275
PEO [Member] | Change in fair value from prior year-end to vesting date of prior years' awards that vested during year |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (1,623,100) | (468,865) | (182,300)
Non-PEO NEO [Member] | Deduct for amounts reported under the "Stock Awards" and Option Awards" in the SCT |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (1,372,424) | (1,829,098) | (1,235,831)
Non-PEO NEO [Member] | Fair value as of year-end of equity awards granted during the year that remain unvested |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 537,826 | 1,286,137 | 1,037,351
Non-PEO NEO [Member] | Change in fair value of prior years' equity awards that remain unvested as of year-end |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (550,147) | (108,942) | 439,657
Non-PEO NEO [Member] | Fair value on vesting date for awards granted and vested in the same year |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 86,062 | 294,903 | 159,400
Non-PEO NEO [Member] | Change in fair value from prior year-end to vesting date of prior years' awards that vested during year |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ (353,176) | $ (60,684) | $ (27,849)

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