Annual report pursuant to Section 13 and 15(d)

Note 2 - Summary of Significant Accounting Policies (Tables)

v3.20.4
Note 2 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   

Year Ended December 31,

 

Excluded potentially dilutive securities (1):

 

2020

   

2019

 
                 

Options to purchase common stock

    1,387,673       3,463,692  

Unvested restricted stock

    5,624,166       259,792  

Financing warrants to purchase common stock

    103,500       4,805,747  

Total potential dilutive securities

    7,115,339       8,529,231  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
                   

Accounts Receivable (Trade)

 
   

Revenue

   

As of December 31,

 
   

2020

   

2019

   

2020

   

2019

 
                                 

Clarios (successor of Johnson Controls Battery Group, Inc.)

    16 %     69 %     %     100 %

P. Kay Metals

    84 %     28 %     %     %
   

2020

   

2019

 
                 

Supplier A

    %     69 %

Supplier B

    %     30 %