XML 38 R25.htm IDEA: XBRL DOCUMENT v3.21.1
Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock-based Compensation Expense for Options Granted Reflected in the Consolidate Statement of Operations and Comprehensive Loss
Stock-based compensation expense for options granted is reflected in the condensed consolidated statements of operations and comprehensive loss as follows (in thousands):
Three months ended March 31,
20212020
General and administrative$590 $103 
Research and development243 119 
Total$833 $222 
Schedule of Stock Option Activity
The following table summarizes the stock option activity under the Plans:
Number of SharesWeighted Average Exercise PriceWeighted Average Remaining Contractual Life (years)Aggregate Intrinsic Value (in thousands)
Options outstanding at December 31, 2020
4,224,433 $0.84 8.9$5,496 
Granted5,192,550 $2.10 $— 
Exercised(157,468)$1.11 $980 
Forfeited(23,970)$13.52 $— 
Options outstanding at March 31, 2021
9,235,545 $1.51 9.3$49,598 
Options exercisable at March 31, 2021
860,287 $1.88 7.7$4,477