Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Summary of Stock Options (Tables)

v3.20.1
Note 11 - Summary of Stock Options (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
Three Months Ended March 31, 2020
 
   
 
 
 
 
 
 
 
 
Weighted
   
 
 
 
   
 
 
 
 
Weighted
   
Average
   
 
 
 
   
Number
   
Average
   
Remaining
   
Aggregate
 
   
of
   
Exercise
   
Contractual
   
Intrinsic
 
   
Shares
   
Price
   
Term (years)
   
Value
 
Options outstanding, beginning of period
   
10,087,678
    $
2.22
     
9.9
    $
3,928,715
 
Options granted
   
468,000
    $
0.88
     
 
     
 
 
Options exercised
   
-
     
 
     
 
     
 
 
Options canceled
   
(123,024
)   $
20.25
     
 
     
 
 
Options outstanding, end of period
   
10,432,654
    $
1.95
     
9.7
    $
-
 
                                 
Vested and exercisable and expected to vest, end of period
   
9,404,561
    $
2.04
     
9.7
    $
-
 
                                 
Vested and exercisable, end of period
   
833,785
    $
9.63
     
9.6
    $
-
 
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
       
 
 
 
 
 
 
 
 
Weighted
   
 
 
 
 
 
 
 
 
 
 
 
Number
   
Weighted
   
Average
   
Number
   
Weighted
 
 
 
 
 
Outstanding
   
Average
   
Remaining
   
Exercisable
   
Average
 
Range of
 
as of
   
Exercise
   
Contractual
   
as of
   
Exercise
 
Exercise Prices
 
March 31, 2020
   
Price
   
Term (Years)
   
March 31, 2020
   
Price
 
                                             
$0.69
-
$0.89
   
10,238,979
    $
0.86
     
9.7
     
813,153
    $
0.87
 
$1.09
-
$1.36
   
155,000
    $
1.26
     
9.9
     
-
    $
-
 
$38.00
-
$58.00
   
1,600
    $
55.81
     
9.2
     
-
    $
-
 
$100.00
-
$197.00
   
20,352
    $
141.85
     
8.6
     
9,174
    $
147.74
 
$202.00
-
$283.00
   
743
    $
251.21
     
7.6
     
392
    $
254.90
 
$311.00
-
$382.00
   
2,625
    $
344.68
     
8.4
     
1,238
    $
345.28
 
$430.00
-
$497.00
   
6,707
    $
454.33
     
7.3
     
4,281
    $
455.78
 
$501.00
-
$567.00
   
3,215
    $
537.49
     
7.1
     
2,432
    $
536.76
 
$600.00
-
$661.00
   
1,392
    $
602.19
     
5.8
     
1,375
    $
601.46
 
$700.00
-
$792.00
   
1,937
    $
767.72
     
6.6
     
1,636
    $
767.47
 
$992.00
-
$992.00
   
104
    $
992.00
     
2.8
     
104
    $
992.00
 
Total:
 
 
   
10,432,654
    $
1.95
     
9.7
     
833,785
    $
9.63
 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
Three Months Ended
 
   
March 31,
 
   
2020
   
2019
 
                 
Expected term (in years)
   
5
     
5
 
Average volatility
   
73%
     
73%
 
Risk-free interest rate
   
0.45%
     
2.53%
 
Dividend yield
   
0%
     
0%
 
   
Three Months Ended
 
   
March 31,
 
   
2020
   
2019
 
                 
Expected term (in years)
   
5
     
5
 
Average volatility
   
73%
     
73%
 
Risk-free interest rate
   
1.39%
     
2.49%
 
Dividend yield
   
0%
     
0%
 
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   
Three Months Ended
 
   
March 31,
 
   
2020
   
2019
 
Cost of revenue
  $
60
    $
32
 
Research and development
   
87
     
40
 
Selling, general and administrative
   
564
     
424
 
Total
   
710
    $
496
 
2017 Employee Stock Purchase Plan [Member]  
Notes Tables  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
   
Three Months Ended
 
   
March 31,
 
   
2020
   
2019
 
                 
Expected term (in years)
   
0.25
     
0.25
 
Average volatility
   
124%
     
74%
 
Risk-free interest rate
   
1.54%
     
2.45%
 
Dividend yield
   
0%
     
0%