10. RESTRICTED STOCK UNITS

A summary of restricted stock unit activity for the six months ended June 30, 2022, is presented below.

SUMMARY OF RESTRICTED STOCK AWARD ACTIVITY 

During the six months ended June 30, 2022, the Company granted 1,334,270 restricted stock units to certain officers, employees and directors. The restricted stock units vest on various dates from January 2023 through March 2026. These restricted stock units were valued based on the closing price of the Company’s common stock on the respective dates of issuance and had an aggregate grant date fair value of $1,561, which is being amortized as share-based compensation expense over the respective vesting terms.

The total fair value of restricted stock units that vested during the three and six months ended June 30, 2022, was $318 and $565, respectively. As of June 30, 2022, the remaining share-based compensation expense associated with previously issued restricted stock units was $2,051 which will be recognized in future periods as the units vest. When calculating basic net loss per share, these shares are included in weighted average common shares outstanding from the time they vest. When calculating diluted net loss per share, these shares are included in weighted average common shares outstanding as of their grant date.