Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Tables)

v3.20.2
Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2020
Accounting Policies [Abstract]  
Schedule of computation of potentially dilutive securities The following shares underlying outstanding convertible notes, stock options, RSUs and warrants to purchase common stock were antidilutive due to a net loss in the periods presented and, therefore, were excluded from the dilutive securities computation for the six months ended June 30, as indicated below.
  June 30,
Excluded potentially dilutive securities (1): 2020 2019
Options to purchase common stock 1,425,004    3,604,001   
Unvested restricted stock units 4,244,003    242,023   
Financing warrants to purchase common stock 103,500    4,839,197   
Total potential dilutive securities 5,772,507    8,685,221   
(1) The number of shares is based on the maximum number of shares issuable on exercise or conversion of the related securities as of the period end. Such amounts have not been adjusted for the treasury stock method or weighted average outstanding calculations as required if the securities were dilutive.
Schedule of concentration of credit risk
Revenues from the following customers each represented at least 10% of total revenue for the three and six months ended June 30, 2020 and June 30, 2019, respectively. They also represented a significant portion of our trade accounts receivable as of December 31, 2019. The Company did not have a trade accounts receivable balance as of June 30, 2020.
Revenue Revenue Trade Accounts Receivable
Three Months Ended June 30, Six Months Ended June 30, June 30, 2020 December 31, 2019
2020 2019 2020 2019
Clarios (successor of Johnson Controls Battery Group, Inc.) —  % 59  % 100  % 59  % —  % 100  %
P. Kay Metals —  % 38  % —  % 38  % —  % —  %