Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Stock-based Compensation (Tables)

v3.21.1
Note 11 - Stock-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2021
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Option numbers are in (000's)                  
    Three months ended
March 31, 2021		  
    Options     Weighted average
exercise price		     Weighted average remaining
contractual
life (years)		  
                   
Outstanding, beginning of period    
11,942
     $
4.97
      
 
  
Granted    
2,962
      
4.47
      
 
  
Exercised    
(39
 )    
1.97
      
 
  
Forfeited    
(703
 )    
5.67
      
 
  
Outstanding, end of the period    
14,162
      
4.85
      
7.1
  
Exercisable, end of the period    
7,887
      
4.59
      
5.95
  
Vested and expected to vest, end of period    
13,220
      
4.83
      
6.99
  
Option numbers are in (000's)                  
    Three months ended
March 31, 2020		  
    Options     Weighted average
exercise price		    
Weighted average remaining
contractual
life (years
)
  
                   
Outstanding, beginning of period    
5,941
     $
2.84
      
 
  
Granted    
6,109
      
6.84
      
 
  
Exercised    
(162
 )    
2.71
      
 
  
Forfeited    
(30
 )    
2.17
      
 
  
Outstanding, end of the period    
11,858
      
4.84
      
8.6
  
Exercisable, end of the period    
3,990
      
2.96
      
6.8
  
Vested and expected to vest, end of period    
10,678
      
4.73
      
8.5
  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
    Three months ended
March 31, 2021		     Three months ended
March 31, 2020		  
             
Risk-free interest rate    
0.4
 %    
1.3
 %
Expected dividend yield    
-
      
-
  
Expected volatility    
80.7
 %    
85.8
 %
Expected life of options (years)    
5
      
5
  
Grant date fair value   $
2.85
     $
4.60
  
Schedule of Share-based Payment Award, Options, Grants in Period [Table Text Block]
Option numbers are in (000's)   Three months ended
March 31, 2021		     Three months ended
March 31, 2020		  
    Number of options     Number of options  
Cliff vesting after one year anniversary    
-
      
300
  
3 year vesting (50%-25%-25%)    
430
      
862
  
4 year vesting (50%-16 2/3%-16 2/3%-16 2/3%)    
2,532
      
4,947
  
Total stock options granted in the period    
2,962
      
6,109
  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
    Three months ended,
March 31, 2021		     Three months ended,
March 31, 2020		  
    Number
(in thousands)		     Weighted average grant date fair value     Number
(in thousands)		     Weighted average grant date fair value  
Outstanding, beginning of period    
-
     $
-
      
40
     $
2.00
  
Granted    
-
      
-
      
645
      
7.32
  
Outstanding, end of period    
-
     $
-
      
685
     $
7.01
  
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
    Three months ended
March 31, 2021		     Three months ended
March 31, 2020		  
             
Research and development   $
1,378
     $
800
  
General and administrative    
5,265
      
3,601
  
Total   $
6,643
     $
4,401