Subsequent Events	12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	14. SUBSEQUENT EVENTS On February 19, 2021 Yves Ribeill, Ph.D., Chair of the Board of Directors of Calyxt, Inc., was appointed as the Executive Chair of the Board of Directors and in that capacity, will serve as Calyxt’s principal executive officer until the appointment of a successor to James Blome, our former Chief Executive Officer. Mr. Blome is entitled to compensation and benefits as part of this termination without cause, and in the first quarter of 2021, we expect to record up to $2.3 million of cash expense for separation-related payments as well as an additional non-cash charge of $0.1 million from the acceleration of expense recognition of sign-on bonus paid to Mr. Blome in a prior period. The cash payments to Mr. Blome will be made over a period of 24 months from the date his separation agreement is executed. As of the date of this Annual Report that has not occurred, however, we expect it to be completed within its required execution period, which is by March 12, 2021. We also expect to record a benefit to earnings from a $2.5 million recapture of non-cash stock compensation expense from forfeitures of Mr. Blome’s unvested stock awards.

Subsequent Events

12 Months Ended

Dec. 31, 2020

14. SUBSEQUENT EVENTS

On February 19, 2021 Yves Ribeill, Ph.D., Chair of the Board of Directors of Calyxt, Inc., was appointed as the Executive Chair of the Board of Directors and in that capacity, will serve as Calyxt’s principal executive officer until the appointment of a successor to James Blome, our former Chief Executive Officer. Mr. Blome is entitled to compensation and benefits as part of this termination without cause, and in the first quarter of 2021, we expect to record up to $2.3 million of cash expense for separation-related payments as well as an additional non-cash charge of $0.1 million from the acceleration of expense recognition of sign-on bonus paid to Mr. Blome in a prior period. The cash payments to Mr. Blome will be made over a period of 24 months from the date his separation agreement is executed. As of the date of this Annual Report that has not occurred, however, we expect it to be completed within its required execution period, which is by March 12, 2021. We also expect to record a benefit to earnings from a $2.5 million recapture of non-cash stock compensation expense from forfeitures of Mr. Blome’s unvested stock awards.