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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of Company's Restricted Share Activity
The following table summarizes all restricted stock unit activity (in thousands, except per share data):
RSUs
Outstanding
Weighted-Average Grant Date Fair Value
Balance as of December 31, 2020870 $2.06 
Granted176 3.25 
Released(184)2.14 
Canceled/Forfeited(15)2.29 
Balance as of December 31, 2021847 $2.28 
Summary Information about Stock Option Activity
The following table summarizes all stock option activity for the periods presented (in thousands, except per share data and time periods):

Options
Outstanding
Weighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual
Term (Years)
Aggregate
Intrinsic
Value
Balance as of December 31, 2020436 $2.81 6.74$424 
Granted— — 
Exercised(24)2.14 
Canceled/Forfeited(15)1.84 
Expired— — 
Balance as of December 31, 2021397 $2.89 5.7$998 
Exercisable as of December 31, 2021335 $3.01 4.4$836