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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Based Compensation Grants
The following table summarizes the stock grants outstanding under our 2010 Employee Compensation Plan ("2010 ECP") and 2017 ECP plans as of December 31, 2021:

 Options OutstandingRSUs OutstandingOptions and RSUs ExercisedAvailable SharesTotal
2017 ECP— 3,960,001 2,734,138 2,705,861 9,400,000 
2010 ECP (*)1,500 — 5,011,511 — 5,013,011 
Total1,500 3,960,001 7,745,649 2,705,861 14,413,011 
(*) 2010 ECP Expired April 2020
Schedule of Stock Options The following table summarizes our stock option activity under the 2010 ECP plan during 2021:
 OptionsWeighted Average Exercise Price
Outstanding, beginning of year9,500 $0.56 
Stock options exercised4,750 $0.56 
Stock options canceled3,250 $0.56 
Outstanding, end of year1,500 $0.56 
Exercisable, end of year1,500 $0.56 
Schedule of RSA Activity The following table summarizes our restricted stock unit activity for 2021:
 Restricted Stock UnitWeighted Average Fair Value
Outstanding, beginning of year1,930,526 $0.28 
Granted4,610,000 $1.36 
Vested(2,171,331)$0.47 
Forfeited(409,194)$1.23 
Outstanding, end of year3,960,001 $1.33