Stock-Based Awards (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Weighted Average Assumptions to Calculate Fair Value of Stock Options

The fair value of each option award is estimated on the date of grant using a Black-Scholes option pricing model applying the weighted-average assumptions noted in the following table:

 

   Year Ended December 31, 
   2021   2020 
Expected life (in years)   6.2    6.2 
Risk-free interest rates   1.0%   0.8%
Volatility   73.2%   67.7%
Dividend yield   -%   -%
Schedule of Stock Based Compensation Expense

Operating expenses include stock-based compensation expense as follows (in thousands):

 

   Year Ended December 31, 
   2021   2020 
Research and development  $833   $464 
General and administrative   2,686    1,763 
Total stock-based compensation expense  $3,519   $2,227 
2012 Equity Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

A summary of Lineage’s 2012 Plan activity and other stock option awards granted outside of the 2012 Plan related information is as follows (in thousands, except per share amounts):

 

  

Number

of Options

Outstanding

  

Number

of RSUs

Outstanding

  

Weighted

Average

Exercise Price

 
December 31, 2019   14,710    166   $2.17 
Options granted   5,256    -    0.71 
Options forfeited   (4,101)   -    2.61 
Restricted stock units vested   -    (73)   - 
December 31, 2020   15,865    93   $1.57 
                
Options granted   6,245    -    2.50 
Options exercises   (4,321)   -    1.72 
Options forfeited   (3,146)   -    1.99 
Restricted units vested   -    (62)   - 
December 31, 2021   14,643    31   $1.84 
Options exercisable at December 31, 2021   6,391        $1.68 
Asterias 2013 Equity Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

A summary of activity under the Asterias Equity Plan from the closing date of the Asterias Merger through December 31, 2021 is as follows (in thousands, except per share amounts):

 

  

Number

of Options

Outstanding

  

Number

of RSUs

Outstanding

  

Weighted

Average

Exercise Price

 
December 31, 2019   350    -   $

1.57

 
Options granted   -    -    - 
Options forfeited   -    -    - 
December 31, 2020   350    -   $1.57 
                
Options granted   -    -    - 
Options forfeited   (109)   -    1.57 
December 31, 2021   241    -   $1.57 
Options exercisable at December 31, 2021   241              $1.57