Restricted Cash

12 Months Ended

Dec. 31, 2020

Cash And Cash Equivalents [Abstract]

Restricted Cash

3. Restricted Cash

As of December 31, 2020, the balance of $9,196 (December 31, 2019 – $3,160) represents cash collateral held as a guarantee relating to an EPI (Expanded Program on Immunization) sales contract, which is restricted until December 2021.