v3.22.1
Stock Based Awards (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes stock option transactions for the 2007 Plan and 2015 Plan, collectively, for the year ended December 31, 2021 and 2020 (table in thousands, except per share amounts):

 

   Number of
Shares
Available
for Grant		   Total
Options
Outstanding		   Weighted
Average
Exercise
Price		   Aggregate
Intrinsic
Value		 
Balance at December 31, 2019   3,588    931   $4.14   $- 
Exercised   -    -    -    - 
Granted   (928)   928    1.33    29 
Expired   (476)   -    -    - 
Cancelled   79    (79)   7.37    - 
Balance at December 31, 2020   2,263    1,780   $2.53   $29 
Increase in authorized options   5,000    -    -    - 
Granted   (1,037)   1,037    1.11    - 
Expired   976    -    -    - 
Cancelled   341    (344)   2.18    - 
Balance at December 31, 2021   7,543    2,473   $1.98   $- 
Schedule of Weighted Average Assumptions Used for Grants

 

Assumptions:    
Weighted average per share grant date fair value  $0.930 
Risk-free interest rate   0.91%
Expected dividend yield   0.00%
Expected volatility   114.62%
Expected terms (in years)   5.83 
      
Assumptions:    
Weighted average per share grant date fair value  $1.08 
Risk-free interest rate   0.44%
Expected dividend yield   0.00%
Expected volatility   107.41%
Expected terms (in years)   5.9 
 
Schedule of Common Stock Reserved for Future Issuance

The following table presents information concerning common stock available for future issuance as of December 31, (in thousands):

   2021   2020 
         
Stock options issued and outstanding   2,473    1,780 
Shares authorized for future option grants   7,543    2,263 
Warrants outstanding   243    243 
Total   10,259    4,286