Note 2 - Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2021

Notes to Financial Statements

Significant Accounting Policies [Text Block]

2. Summary of Significant Accounting Policies

The significant accounting policies and estimates used in preparation of the condensed consolidated financial statements are described in the Company’s audited consolidated financial statements as of and for the year ended December 31, 2020, and the notes thereto, which are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, as filed with the Securities and Exchange Commission, or the SEC, on February 25, 2021. There have been no material changes in the Company’s significant accounting policies during the three months ended March 31, 2021.

Basis of presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) as found in the Accounting Standards Codification (“ASC”) and ASU of the Financial Accounting Standards Board (“FASB”) and pursuant to the rules and regulations of the SEC. Accordingly, they do not include all the information and footnotes required by such accounting principles for complete financial statements. In the opinion of management, all adjustments (which include normal recurring adjustments) considered necessary to present fairly each of the condensed consolidated balance sheet as of March 31, 2021, the condensed consolidated statements of operations for the three months ended March 31, 2021 and March 31, 2020, the condensed consolidated statements of stockholders' equity for the three months ended March 31, 2021 and March 31, 2020 and the condensed consolidated statements of cash flows for the three months ended March 31, 2021 and March 31, 2020, as applicable, have been made. The condensed consolidated balance sheet as of December 31, 2020 has been derived from the Company’s audited financial statements as of such date, but it does not include all disclosures required by U.S. GAAP. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements for the period ended December 31, 2020, which are included on Form 10-K filed with the Securities and Exchange Commission on February 25, 2021.

The results of operations for the three months ended March 31, 2021 are not necessarily indicative of results that may be expected for the year ending  December 31, 2021.

Principles of consolidation

The accompanying unaudited condensed consolidated financial statements include the accounts of the Company and its Subsidiaries, both of which are wholly-owned subsidiaries. Significant inter-company accounts and transactions have been eliminated in consolidation.

Use of estimates

The preparation of the condensed consolidated financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of expenses during the period. Significant items subject to such estimates and assumptions include the carrying amount and valuation of long-lived assets, the valuation of conversion features of convertible debt, valuation allowances for deferred tax assets, the determination of fair value of estimated asset retirement obligations, the determination of stock option expense and the determination of the fair value of stock warrants issued. Actual results could differ from those estimates.

Net loss per share

Basic net loss per share is computed by dividing net loss by the weighted average number of common shares outstanding during the period. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of common share equivalents outstanding for the period determined using the treasury-stock method or the if-converted method, as applicable. For purposes of this calculation, stock options, restricted stock units (RSUs) and warrants to purchase common stock are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive. 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 three months ended March 31, as indicated below.

	March 31,
Excluded potentially dilutive securities (1):	2021		2020
Options to purchase common stock		1,040,522		1,709,106
Unvested restricted stock units		4,771,537		2,397,299
Financing warrants to purchase common stock		6,372		805,747
Total potential dilutive securities		5,818,431		4,912,152

(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.

Segment and geographic information

Operating segments are defined as components of an enterprise engaging in business activities for which discrete financial information is available and regularly reviewed by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The chief operating decision maker views its operations and manages its business in one operating segment, and the Company operates in only one geographic segment.

Concentration of credit risk

Revenues from the following customer represented at least 10% of total revenue for the three months ended March 31, 2021 and March 31, 2020, respectively. The Company did not have a trade accounts receivable balance as of  March 31, 2021 or December 31, 2020. 

	Revenue
	Three Months Ended March 31,
	2021			2020
Clarios (successor of Johnson Controls Battery Group, Inc.)		—	%		100	%

Recent accounting pronouncements

There were no recent accounting pronouncements or changes in accounting pronouncements during the three months ended March 31, 2021 that are of significance or potential significance to the Company.

Insurance Proceeds

On November 29, 2019, there was a fire in the AquaRefining area of the TRIC facility. As of March 31, 2021, the Company had received $23.6 million in insurance payments as a result of the fire damage. Insurance proceeds of $0.2 million collected during the first quarter of 2021 were recorded as other income. Subsequent to the end of the first quarter of 2021, the Company received an additional insurance payment of $1.4 million, specifically related to its business interruption claims with the insurance provider. Additional future insurance proceeds from the business interruption and property claims are anticipated based on current estimates and calculations.