10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2022

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______________ to _______________

Commission File Number 001-35521

CLEARSIGN TECHNOLOGIES CORPORATION

(Exact name of registrant as specified in its charter)

Washington
(State or other jurisdiction of
incorporation or organization) 26-2056298
(I.R.S. Employer
Identification No.)

8023 E. 63rd Place, Suite 101

Tulsa, Oklahoma 74133

(Address of principal executive offices)

(Zip Code)

(206) 673-4848

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	CLIR	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ⌧ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period than the registrant was required to submit such files). Yes ⌧ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐	Accelerated filer ☐
Non-accelerated filer ⌧	Smaller reporting company ☒
	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐  No ⌧

As of May 4, 2022, the issuer has 32,160,131 shares of common stock, par value $0.0001, issued and outstanding.

TABLE OF CONTENTS

PART I	FINANCIAL INFORMATION
Item 1.	Unaudited Condensed Consolidated Financial Statements
	Unaudited Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021	1
	Unaudited Condensed Consolidated Statements of Operations for the three months ended March 31, 2022 and, 2021	2
	Unaudited Condensed Consolidated Statements of Stockholders’ Equity for the three month periods ended March 31, 2022 and 2021	3
	Unaudited Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2022 and 2021	4
	Notes to Unaudited Condensed Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Conditions and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	23
Item 4.	Controls and Procedures	23
PART II	OTHER INFORMATION	24
Item 1.	Legal Proceedings	24
Item 1A.	Risk Factors	24
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	24
Item 3.	Defaults Upon Senior Securities	24
Item 4.	Mine Safety Disclosures	24
Item 5.	Other Information	24
Item 6.	Exhibits	25
	SIGNATURES	26

PART I-FINANCIAL INFORMATION

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

ClearSign Technologies Corporation and Subsidiary

Condensed Consolidated Balance Sheets

(Unaudited)

(in thousands, except share and per share data)	March 31,		December 31,
	2022		2021
ASSETS
Current Assets:
Cash and cash equivalents	$	6,667	$	7,607
Accounts receivable, net		27		33
Contract assets		244		39
Prepaid expenses and other assets		401		345
Total current assets		7,339		8,024
Fixed assets, net		493		530
Patents and other intangible assets, net		802		799
Other assets		10		10
Total Assets	$	8,644	$	9,363
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	294	$	224
Current portion of lease liabilities		212		205
Accrued compensation and related taxes		196		218
Contract liabilities		84		84
Total current liabilities		786		731
Long Term Liabilities:
Long term lease liabilities		294		350
Total liabilities		1,080		1,081
Commitments and contingencies (note 7)
Stockholders’ Equity:
Preferred stock, $0.0001 par value, zero shares issued and outstanding		—		—
Common stock, $0.0001 par value, 32,154,746 and 31,581,666 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively		3		3
Additional paid-in capital		91,807		91,035
Accumulated other comprehensive income		9		9
Accumulated deficit		(84,255)		(82,765)
Total ClearSign Technologies Corporation stockholders' equity		7,564		8,282
Noncontrolling Interest		—		—
Total equity		7,564		8,282
Total Liabilities and Equity	$	8,644	$	9,363

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

1

ClearSign Technologies Corporation and Subsidiary

Condensed Consolidated Statements of Operations

(Unaudited)

(in thousands, except share and per share data)	For the Three Months Ended
	March 31,
	2022		2021
Revenues	$	—	$	363
Cost of goods sold		—		225
Gross Income		—		138
Operating expenses:
Research and development		108		826
General and administrative		1,409		1,333
Total operating expenses		1,517		2,159
Loss from operations		(1,517)		(2,021)
Other income
Gain from sale of assets		23		—
Other income, net		4		—
Net Loss	$	(1,490)	$	(2,021)
Net loss per share - basic and fully diluted	$	(0.05)	$	(0.07)
Weighted average number of shares outstanding - basic and fully diluted		31,826,221		30,526,571

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

2

ClearSign Technologies Corporation and Subsidiary

Condensed Consolidated Statements of Stockholders’ Equity

(Unaudited)

For the Three Months Ended March 31, 2022 and 2021

										Total ClearSign
						Other				Technologies Corp.
(in thousands, except per share data)	Common Stock			Additional		Comprehensive		Accumulated		Stockholders’		Noncontrolling
	Shares	Amount		Paid-In Capital			Income	Deficit		Equity		Interest		Total Equity
Balances at December 31, 2021	31,582	$	3	$	91,035	$	9	$	(82,765)	$	8,282	$	—	$	8,282
Shares issued upon exercise of options ($0.89 per share)	1		—		—		—		—		—		—		—
Shares issued upon exercise of options ($2.93 per share)	3		—		—		—		—		—		—		—
Fair value of stock issued in payment of accrued compensation	66		—		95		—		—		95		—		95
Fair value of stock options granted in payment of accrued compensation	—		—		12		—		—		12		—		12
Share based compensation	3		—		80		—		—		80		—		80
Shares issued through the use of At-The Market issuance ($1.24 average per share)	496		—		578		—		—		578		—		578
Shares issued for services ($1.93 per share)	4		—		7		—		—		7		—		7
Foreign-Exchange Translation Adjustment	—		—		—		—		—		—				—
Net loss	—		—		—		—		(1,490)		(1,490)		—		(1,490)
Balances at March 31, 2022	32,155	$	3	$	91,807	$	9	$	(84,255)	$	7,564	$	—	$	7,564

										Total ClearSign
						Other				Technologies Corp.
	Common Stock			Additional		Comprehensive		Accumulated		Stockholders’		Noncontrolling
	Shares	Amount		Paid-In Capital			Income	Deficit		Equity		Interest		Total Equity
Balances at December 31, 2020	30,077	$	3	$	84,411	$	—	$	(74,874)	$	9,540	$	1	$	9,541
									—		—
Shares issued upon exercise of options ($1.90 per share)	1		—		2		—		—		2		—		2
Shares issued upon exercise of options ($3.80 per share)	9		—		36		—		—		36		—		36
Shares issued upon exercise of options ($1.21 per share)	3		—		4		—		—		4		—		4
Shares issued upon exercise of warrants ($1.80 per share)	38		—		67		—		—		67		—		67
Fair value of stock options issued for board service	—		—		210		—		—		210		—		210
Fair value of stock issued in payment of accrued compensation	64		—		217		—		—		217		—		217
Share based compensation	—		—		410		—		—		410		—		410
Shares issued through use of At The Market issuance ($ 4.84 average per share)	941		—		4,469		—		—		4,469		—		4,469
Proceeds receivable from At The Market issuance	—		—		(1,076)		—		—		(1,076)		—		(1,076)
Shares issued for services ($2.33 per share)	4		—		9		—		—		9		—		9
Net loss	—		—		—		—		(2,021)		(2,021)		—		(2,021)
Balances at March 31, 2021	31,137	$	3	$	88,759	$	—	$	(76,895)	$	11,867	$	1	$	11,868

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

3

ClearSign Technologies Corporation and Subsidiary

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(in thousands)	For the Three Months Ended March 31,
	2022		2021
Cash flows from operating activities:
Net loss	$	(1,490)	$	(2,021)
Adjustments to reconcile net loss to net cash used in operating activities:
Common stock issued for services		7		9
Share based compensation		80		620
Depreciation and amortization		36		46
Gain from sale of fixed assets		(23)		—
Reserve for prepaid materials		—		96
Change in operating assets and liabilities:
Contract assets		(205)		(247)
Accounts receivable		6		(124)
Prepaid expenses and other assets		(56)		127
Accounts payable and accrued liabilities		57		2
Accrued compensation and related taxes		85		25
Contract liabilities		—		(46)
Net cash used in operating activities		(1,503)		(1,513)
Cash flows from investing activities:
Acquisition of fixed assets		(5)		(54)
Disbursements for patents and other intangible assets		(33)		(34)
Proceeds from sale of fixed assets		23		—
Net cash used in investing activities		(15)		(88)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of offering costs		578		3,393
Proceeds from exercise of stock options and warrants		—		109
Net cash provided by financing activities		578		3,502
Cash and cash equivalents:
Net change in cash and cash equivalents		(940)		1,901
Cash and cash equivalents, beginning of period		7,607		8,824
Cash and cash equivalents, end of period	$	6,667	$	10,725
Supplemental disclosure of cash flow information:
Officer and employee equity awards for prior year accrued compensation	$	107	$	217

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

4

ClearSign Technologies Corporation

Notes to Unaudited Condensed Consolidated Financial Statements

Note 1 – Organization and Description of Business

ClearSign Technologies Corporation (“ClearSign” or the “Company”) designs and develops products and technologies that have been shown to significantly improve key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety, and overall cost-effectiveness. The Company’s patented technologies are designed to be embedded in established OEM products as ClearSign Core™ and ClearSign Eye™ and other sensing configurations in order to enhance the performance of combustion systems and fuel safety systems in a broad range of markets. These markets include energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries. The Company’s primary technology is its ClearSign Core technology, which achieves very low emissions without the need of external flue gas recirculation, selective catalytic reduction, or higher excess air operation.

The Company was incorporated in the State of Washington in 2008. During January 2022, the Company relocated its headquarters from Seattle, Washington to Tulsa, Oklahoma. On July 28, 2017, the Company incorporated a subsidiary, ClearSign Asia Limited, in Hong Kong to represent the Company’s business and technological interests throughout Asia. Through ClearSign Asia Limited, the Company has established a Wholly Foreign Owned Enterprise (WFOE) in China – ClearSign Combustion (Beijing) Environmental Technologies Co., LTD.

Unless otherwise stated or the context otherwise requires, the terms ClearSign and the Company refer to ClearSign Technologies Corporation and its subsidiary, ClearSign Asia Limited.

Liquidity

The Company's financial statements have been presented on the basis that it is a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company’s technologies are currently in field development, but with nominal fully operational commercial installations, and have generated nominal revenues from operations to date to meet operating expenses. In order to generate meaningful revenues, the technologies must be fully developed, gain market recognition and acceptance, and develop a critical level of successful sales and product installations.

The Company has recently financed its operations primarily through issuances of equity securities including $6.1 million in gross proceeds raised from its At-The-Market (ATM) program in which the Company issued a total of 1.6 million shares of common stock at a weighted average price of $3.85 per share as of March 31, 2022. Costs associated with the ATM program totaled approximately $227 thousand and the Company received net cash proceeds approximating $5.9 million.

The Company has incurred losses since its inception totaling $84.3 million and expects to experience operating losses and negative cash flows for the foreseeable future. Management believes that the successful growth and operation of the Company’s business is dependent upon our ability to obtain adequate sources of funding through co-development agreements, strategic partnering agreements, or equity or debt financing to adequately support product commercialization efforts, protect intellectual property, form relationships with strategic partners, and provide for working capital and general corporate purposes. There can be no assurance that the Company will be successful in achieving its long-term plans as set forth above, or that such plans, if consummated, will result in profitable operations or enable the Company to continue in the long-term as a going concern.

5

Note 2 – Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”) for Form 10-Q. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet at December 31, 2021 has been derived from the Company’s audited financial statements as of that date.

In the opinion of management, these condensed consolidated financial statements reflect all normal recurring and other adjustments necessary for a fair presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Operating results for interim periods are not necessarily indicative of operating results for an entire fiscal year or any other future periods.

The accompanying unaudited condensed consolidated financial statements include the accounts of ClearSign and its subsidiary. Intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Revenue Recognition and Cost of Sales

The Company recognizes revenue and related cost of goods sold in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification 606 Revenue from Contracts with Customers (ASC 606). When applying ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the promises and performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the performance obligations are satisfied. Revenues and cost of goods sold are recognized once the goods or services are delivered to the customer’s control or non-refundable performance obligations are satisfied. The Company’s contracts with customers generally have performance obligations and a schedule of non-refundable cancellation obligations. The contracts generally will be fully performed upon delivery of certain drawings or equipment. Revenue related to the contracts is recognized following the completion of non-refundable performance obligations as defined in the contract.

The Company’s contracts generally include progress payments from the customer upon completion of defined milestones. As these payments are received, they are offset against accumulated project costs and recorded as either contract assets or contract liabilities. Upon completion of the performance obligations and collectability is determined, revenue is recorded. For any contract that is expected to incur costs in excess of the contract price, the Company accrues the estimated loss in full in the period such determination is made.

Contract Acquisition Costs and Practical Expedients

For contracts that have a duration of less than one year, the Company follows ASC 606, Narrow Scope Improvements and Practical Expedients, and expenses those costs when incurred. For contracts with a life exceeding one year, the Company records those costs when performance obligations related to the contract are completed. The Company generally expenses sales commissions when incurred. The Company amortizes those costs within general and administrative expenses over the life of the contract.

6

Product Warranties

The Company warrants all installed products against defects in materials and workmanship for a period specified in each contract by replacing failed parts. Accruals for product warranties are based on historical or expected warranty experience and current product performance trends and are recorded as a component of cost of sales at the time revenue is recognized. The warranty liabilities are reduced by material and labor costs used to replace parts over the warranty period in the periods in which the costs are incurred. The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary, and such adjustments could be material in the future if estimates differ significantly from actual warranty expense. Product warranties are included in accrued liabilities in the balance sheets.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash on deposit in a checking and savings account.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivables are recorded at the contractual invoiced amount. An allowance for doubtful accounts is established, as necessary, based on past experience and management’s judgment. The determination of the collectability of amounts due from customers require the Company to make judgments regarding future events and trends. Allowances for doubtful accounts are determined based on assessing the Company’s portfolio on an individual customer and on an overall basis. This process consists of a review of historical collection experience, current aging status of the customer accounts, and the financial condition of the Company’s customers. Based on a review of these factors, the Company may establish or adjust the allowance for specific customers and the accounts receivable portfolio as a whole.

Fixed Assets and Leases

Fixed assets are recorded at cost. Leases are recorded in accordance with FASB ASC 842, Leases. For those leases with a term greater than one year, the Company recognizes a right-of-use asset and a lease liability measured at the present value of the lease payments at the time of the lease inception or modification. Lease costs are recognized in the income statement over the lease term on a straight-line basis. Leases with a term of 1 year or less are considered short term leases with rent expense recognized over the lease term. Depreciation is computed using the straight-line method over the estimated useful lives of the respective lease assets. Leasehold improvements are depreciated over the life of the lease or their useful life, whichever is shorter. All other fixed assets are depreciated over three to four years. Maintenance and repairs are expensed as incurred.

7

Patents and Trademarks

Third-party expenses related to patents and trademarks are recorded at cost, less accumulated amortization. Amortization is computed using the straight-line method over the estimated useful lives of the assets once they are awarded. Patent application costs are deferred pending the outcome of patent and trademark applications. Costs associated with unsuccessful patent applications and abandoned intellectual property are expensed when determined to have no continuing value in current business activity. We evaluate the recoverability of the carrying values of intangible assets each reporting period.

Impairment of Long-Lived Assets

The Company tests long-lived assets, consisting of fixed assets, patents, trademarks, and other intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable through the estimated undiscounted cash flows expected from the use and eventual disposition of the assets. In the event an asset is not fully recoverable a loss is recognized based on the amount by which the carrying amount exceeds the fair value of the long-lived assets. Fair value is determined based on the present value of estimated expected cash flows using a discount rate commensurate with the risks involved, quoted market prices, or appraised values depending upon the nature of the assets. Losses on long-lived assets to be disposed of is determined in a similar manner, except those fair values are reduced for the cost of disposal.

Fair Value of Financial Instruments

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial assets and liabilities within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs used to establish fair value are the following:

● Level 1 – Quoted prices in active markets for identical assets or liabilities.

● Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

● Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company’s financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses. As of the balance sheet dates, the estimated fair values of the financial instruments were not materially different from their carrying values as presented on the balance sheets. This is primarily attributable to the short-term nature of these instruments.

The Company did not identify any other recurring or non-recurring assets and liabilities that are required to be presented in the balance sheets at fair value.

8

Research and Development

The cost of research and development is expensed as incurred. Research and development costs consist of salaries, benefits, share based compensation, consumables, and consulting fees, including costs to develop and test prototype equipment and parts. Research and Development costs have been offset by funds received, if any, from strategic partners in cost sharing, collaborative projects. During the three months ended March 31, 2022 and March 31, 2021, the Company did not receive any funds from such arrangements to partially offset funding for research and development activities.

Income Taxes

The Company accounts for income taxes using an asset and liability approach which allows for the recognition and measurement of deferred tax assets based upon the likelihood of realization of tax benefits in future years. Under the asset and liability approach, deferred taxes are provided for the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. A valuation allowance is provided for deferred tax assets if it is more likely than not the Company would not be able to realize their benefits, or that future deductibility is uncertain. Tax benefits are recognized only if it is more likely than not that the tax benefits will be utilized in the foreseeable future.

Share-Based Compensation

The costs of all employee stock options, as well as other equity-based compensation arrangements, are reflected in the unaudited condensed consolidated financial statements based on the estimated fair value of the awards on the grant date. That cost is recognized over the period during which an employee is required to provide service in exchange for the award, or in the case of performance options, expense is recognized upon completion of a milestone as defined in the grant agreement. Share-based compensation for stock grants to non-employees is determined as the fair value of the consideration received or the fair value of equity instruments issued, whichever is more reliably measured.

Foreign Operations

The accompanying unaudited condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021 include assets amounting to approximately $227 thousand and $274 thousand, respectively, relating to operations of ClearSign Asia Limited. The Beijing registered capital requirement is $350 thousand, which is required to be paid by 2027, and of which none has been paid to date. It is always possible that unanticipated events in foreign countries could disrupt the Company’s operations, and since the first quarter of 2020 this has been and currently continues to be the case with the effects of the recent COVID-19 pandemic.

Foreign Currency

Assets and liabilities of ClearSign Asia Limited with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using rates that approximate those in effect during the period. The resulting translation adjustments are included in the Company’s condensed consolidated balance sheets in the stockholders’ equity section as a component of accumulated other comprehensive gain (loss).

Noncontrolling Interest

The subsidiary of the Company has a minority shareholder agreement representing an ownership interest of 1.00% of ClearSign Asia Limited. The Company accounts for this noncontrolling interest pursuant to FASB ASC 810 whereby gains and losses in a subsidiary with a noncontrolling interest are allocated to the noncontrolling interest based on the ownership percentage of the noncontrolling interest, even if that allocation results in a deficit noncontrolling interest balance.

9

Net Loss per Common Share

Basic loss per share is computed by dividing loss available to common stockholders by the weighted-average number of common shares outstanding. Diluted loss per share is computed similar to basic loss per share except that the denominator is increased to include additional common shares available upon exercise of stock options and warrants using the treasury stock method, except for periods for which no common share equivalents are included because their effect would be anti-dilutive. At March 31, 2022 and December 31, 2021, potentially dilutive shares outstanding amounted to 3.3 million and 3.1 million, respectively.

Recently Issued Accounting Pronouncements

In June 2017, the FASB issued an Accounting Standards Update (ASU) 2016-13, Financial Instruments (Topic 326) Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. The standard replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. ASU 2016-13, and related amendments, are effective for fiscal years beginning after December 15, 2022. The Company has not completed its assessment of the standard but does not expect the adoption to have a material impact on its financial statements.

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, which outlines disclosure requirements for entities that receive assistance from a government body. ASU 2021-10, and related amendments, are affective for annual reports beginning after December 15, 2021. The Company does not expect the adoption to have a material impact on its financial statements.

Note 3  Fixed Assets

Fixed Assets

Fixed assets are summarized as follows:

	March 31,		December 31,
(in thousands)	2022		2021
Machinery and equipment	$	666	$	722
Office furniture and equipment		224		218
Leasehold improvements		192		192
		1,082		1,132
Accumulated depreciation and amortization		(1,006)		(1,055)
		76		77
Operating lease ROU assets, net		417		453
Total	$	493	$	530

Depreciation expense for the three months ended March 31, 2022 and 2021 totaled $7 thousand and $8 thousand, respectively.

Leases

The Company leases office space in Seattle, Washington, Tulsa, Oklahoma and Beijing, China. The Beijing lease is treated as a short-term lease. The monthly rent for the Beijing lease is approximately $5 thousand.

The Seattle and Tulsa leases are classified as operating leases, with remaining terms ranging from one to six years; contractual language requires renewal negotiations to occur at or near termination. These leases are normal and customary for office space, in that, contractual guarantees exist requiring the lessee to return the premises to its original functional state. In 2021, the Company accrued an estimated cost of $32 thousand to prepare for the restoration of the Seattle office. The Company plans to exit the Seattle lease on or before contract termination as part of our headquarters

10

move from Seattle to Tulsa. In preparation for this move, the Company entered into the Tulsa operating lease agreement in April 2021.

The Seattle and Tulsa leases contain fixed annual lease payments that increase annually by factors that range between 2% to 3%. Total monthly minimum rent is approximately $24 thousand. Contractual agreements contain expiration dates ranging from less than twelve months to less than six years.

Supplemental balance sheet information related to operating leases is as follows:

		March 31,		December 31,
(in thousands)		2022		2021
Operating lease ROU assets, net	$	417	$	453
Lease Liabilities:
Current lease liabilities	$	212	$	205
Long term lease liabilities		294		350
Total lease liabilities	$	506	$	555

		For the Three Months Ended
		March 31,
		2022			2021
Operating lease costs	$	57		$	51
Supplemental cash flow information related to leases is as follows:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	57		$	53
Non-cash impact of new leases and lease modifications
New operating lease liabilities	$	—		$	320
Weighted average remaining lease term (in years):		2.6
Weighted average discount rate:		5.8	%

Minimum future payments under the Company’s lease liabilities at March 31, 2022 are as follows:

	Discounted		Payments
	lease		due under
(in thousands)	liability		lease
	payments		agreements
2022 (remaining 9 months)	$	158	$	176
2023		122		136
2024		54		64
2025		59		66
2026		63		67
Thereafter		50		51
Total	$	506	$	560

At March 31, 2022, $56 thousand of our future minimum lease payments represented interest.

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Note 4 – Patents and Other Intangible Assets

Patents and other intangible assets are summarized as follows:

	March 31,		December 31,
(in thousands)	2022		2021
Patents
Patents pending	$	473	$	439
Issued patents		577		577
		1,050		1,016
Trademarks
Trademarks pending		1		3
Registered trademarks		95		94
		96		97
Other		8		8
		1,154		1,121
Accumulated amortization		(352)		(322)
	$	802	$	799

Future amortization expense associated with issued patents and registered trademarks as of March 31, 2022 is as follows:

(in thousands)
2022 (remaining 9 months)	$	88
2023		96
2024		74
2025		42
2026		9
Thereafter		11
	$	320

The amortization life for patents ranges between three to five years, with trademark lives set at ten years. The Company does not amortize patents or trademarks classified as pending.

During the three months ended March 31, 2022 and 2021, the Company assessed its patent and trademark assets. The Company also evaluated its strategic approach to the pursuit and protection of its intellectual property. It is the intent of the Company to continue to pursue intellectual property protection.

If the Company identifies certain assets where the intellectual property does not directly align with our core technology, we will impair the intangible asset and write-off any monies to research and development expense.

Note 5 – Revenue, Contract Assets and Contract Liabilities

The Company recognized no revenues during the three months ended March 31, 2022 and $363 thousand of revenue during the three months ended March 31, 2021 from the completion and delivery of a burner under a product contract with an infrastructure company.

The Company did not record any cost of goods sold for the three months ended March 31, 2022. During the three months ended March 31, 2021, the Company recognized cost of goods sold of $250 thousand from the burner contract. Additionally, the Company recognized $18 thousand in cost of goods sold on a contract that the Company estimated would show a loss upon completion, and $8 thousand in residual costs associated with a contract that was completed during 2020. The recognized cost of goods sold was offset by adjustments totaling $51 thousand related to the reversal of accrual for product warranties that expired on three completed projects from the year 2018.

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The Company had contract assets of $244 thousand and $39 thousand at March 31, 2022 and December 31, 2021, respectively. The Company had contract liabilities of $84 thousand at March 31, 2022 and December 31, 2021.

Note 6 – Equity

Common Stock and Preferred Stock

The Company is authorized to issue 62.5 million shares of common stock and 2.0 million shares of preferred stock. Preferences, limitations, voting powers and relative rights of any preferred stock to be issued may be determined by the Company’s Board of Directors. The Company has not issued any shares of preferred stock.

In July 2018, the Company completed a private equity offering and executed a Stock Purchase Agreement with clirSPV, LLC which permits participation in future capital raising transactions (Participation Right) on the same terms as other investors participating in such transactions. The Participation Right will expire on December 31, 2023. In no event may the Participation Right be exercised to the extent it would cause clirSPV, LLC or any of its affiliates to beneficially own 20% or more of the Company’s then outstanding common stock or hold shares with 20% or more of the voting power.

During the three months ended March 31, 2022, the Company issued approximately 496 thousand shares of its common stock at an average price of $1.24 per share for gross proceeds of approximately $614 thousand pursuant to an At-The-Market (ATM) Offering Sales Agreement with Virtu Americas LLC, as sales agent pursuant to which it may sell shares of common stock with an aggregate offering price of up to $15.0 million. As of March 31, 2022, the Company has issued approximately 1.6 million shares of common stock under the ATM program, at an average price of $3.85 per share. Gross proceeds totaled approximately $6.1 million and net cash proceeds was approximately $5.9 million.

Equity Incentive Plan

On June 17, 2021, the Company's shareholders approved and the Company adopted the ClearSign Technologies Corporation 2021 Equity Incentive Plan (2021 Plan) which permits the Company to grant Incentive Stock Options, Non-statutory Stock Options, Stock Appreciation Rights, Restricted Stock, Restricted Stock Units, Performance Units, and Performance Shares, to eligible participants, which includes employees, directors and consultants. The Compensation Committee of the Board of Directors is authorized to administer the 2021 Plan.

The 2021 Plan provides for an annual increase in available shares equal to the lessor of (i) 10% of the aggregate number of shares of Common Stock issued by the Company in the prior fiscal year; or (ii) such number provided by the Compensation Committee; provided, however, that the total cumulative increase in the number of shares available for issuance pursuant to this automatic share increase shall not exceed 400 thousand shares of common stock. In 2022, the board of directors approved an increase of 150,423 shares.

Ending balances of the Plans are as follows:

	March 31,	December 31,
(in thousands)	2022	2021
Outstanding options and restricted stock units	3,307	3,076
Reserved but unissued shares under the Plans	2,758	2,901
Total authorized shares under the Plans	6,065	5,977

Stock Options

Under the terms of the 2021 Plan, incentive stock options and nonstatutory stock options must have an exercise price at or above the fair market value on the date of the grant. At the time of grant, the Company will determine the period within which the option may be exercised and will specify any conditions that must be satisfied before the option vests and may be exercised. The Company estimates the fair value of stock options on the date of grant using the Black-Scholes option-pricing model.

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As permitted by SEC Staff Accounting Bulletin (SAB) 107, management utilized the simplified approach to estimate the expected term of the options, which represents the period of time that options granted are expected to be outstanding. Expected volatility has been determined through the Company’s historical stock price volatility. The Company has not made an estimate of forfeitures at the time of the grant, but rather accounts for forfeitures at the time they occur. The risk-free rate for periods within the expected life of the option is based on the U.S. Treasury yield in effect at the time of grant. The Company has never declared or paid dividends and has no plans to do so in the foreseeable future.

The following weighted-average assumptions were utilized in the calculation of the fair value of stock options:

	March 31,
	2022
Expected life	5.71 years
Weighted average volatility	77.64	%
Weighted average risk-free interest rate	1.39	%
Expected dividend rate	0	%

Compensation expense for stock option awards was $42 thousand and $410 thousand for the three months ended March 31, 2022 and 2021, respectively.

A summary of the Company’s stock option activity and changes is as follows:

	March 31,
	2022
				Weighted
				Average
	Options to	Weighted		Remaining
	Purchase	Average		Contractual
	Common	Exercise		Life (in
(in thousands)	Stock	Price		years)
Outstanding at January 1	2,964	$	2.06	6.89
Granted	88	$	1.26	9.76
Exercised	(3)	$	0.89	—
Forfeited/Expired	(10)	$	2.93	—
Outstanding at March 31	3,039	$	2.03	6.76
Exercisable at March 31	2,202	$	1.71	6.05

The estimated aggregate pretax intrinsic value of the Company’s outstanding vested stock options at March 31, 2022 is $848 thousand. The intrinsic value is the difference between the Company’s common stock price and the option exercise prices multiplied by the number of in-the-money options. This amount changes based on the fair value of the Company’s common stock.

At March 31, 2022, there was $1.8 million of total unrecognized compensation cost related to non-vested stock option-based compensation arrangements. Vesting criteria ranges from time-based to performance-based. The Company records costs for time-based arrangements ratably across the timeframe, whereas performance-based arrangements require management to continually evaluate predetermined goals against actual circumstances.

Restricted Stock Units

The Company approved compensation for board service to be paid to its independent directors in restricted stock units (“RSUs”) under the 2021 Plan. Compensation is earned on a quarterly basis with the target value of compensation set at $85 thousand per quarter. A RSU grant is to be awarded to each independent director in the beginning of the quarter in which services will be rendered, and the number of RSUs granted is to be based on the trading value of the Company’s stock on the date of the award.

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The vesting of the RSU grants is contingent upon the occurrence of one of four future events which the Company cannot predict or control. Accordingly, stock based compensation has not been recognized for services performed during each of the three months ended March 31, 2022 or 2021 in accordance with FASB Accounting Standards Codification, Topic 718, Compensation-Stock Compensation, (ASC 718). During the three months ended March 31, 2022, the Company issued 59 thousand RSUs for board services amounting to $85 thousand of unrecognized compensation.

During January 2022, the Company issued retention bonuses for employees in the form of RSUs. These awards vest 12 months from the date of award for services rendered in 2022. During the three months ended March 31, 2022, the Company issued 97 thousand RSUs to employees amounting to $35 thousand of recognized compensation and $105 thousand for unrecognized compensation.

Stock Grants

During the three months ended March 31, 2022, the Company issued 66 thousand shares of common stock with a fair value of $1.44 per share to its employees. These shares were issued in lieu of cash for payment of 2021 accrued bonuses totaling $125 thousand that were recorded during the year ended December 31, 2021. In addition, the Company issued 3 thousand shares for a one-time $3 thousand bonus to one employee in recognition of their performance.

Consultant Stock Plan

The 2013 Consultant Stock Plan (the Consultant Plan) provides for the granting of shares of common stock to consultants who provide services related to capital raising, investor relations, and making a market in or promoting the Company’s securities. The Company’s officers, employees, and board members are not entitled to receive grants from the Consultant Plan. The Compensation Committee of the Board of Directors is authorized to administer the Consultant Plan and establish the grant terms. The Consultant Plan provides for quarterly increases in the available number of authorized shares equal to the lesser of 1% of any new shares issued by the Company during the quarter immediately prior to the adjustment date or such lesser amount as the Board of Directors shall determine.

The Consultant Plan activity and change is as follows:

	March 31,
(in thousands)	2022
Reserved but unissued shares January 1		211
Grants		(4)
Reserved but unissued shares		207

The Consultant Plan compensation expense is summarized as follows:

	For the Three Months Ended
	March 31,
	2022		2021
Compensation Expense	$	7	$	9
Weighted Average Value Per Share	$	1.93	$	2.33

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Inducement Stock Options

Pursuant to the rules of The Nasdaq Stock Market, and in compliance with those rules, the Company may issue equity awards, including stock options, as an inducement to an individual to accept employment with the Company. Inducement awards need not be approved by the Company's shareholders. During the year ended December 31, 2019, the Company granted 341 thousand non-qualified stock options to its Chief Executive Officer. The fair value of the non-qualified stock options estimated on the date of grant using the Black-Scholes valuation model was $176 thousand. The compensation expense recognized for these awards for the three months ended March 31, 2022 and 2021 was zero and $13 thousand, respectively.

Note 7 – Commitments and Contingencies

Litigation

From time to time the Company may become involved in various lawsuits and legal proceedings which arise in the ordinary course of business. Litigation is subject to inherent uncertainties and an adverse result in any such matter may harm the Company’s business. As of the date of this report, the Company is not a party to any material pending legal proceedings or claims that the Company believes will have a material adverse effect on the business, financial condition or operating results.

Indemnification Agreements

The Company maintains indemnification agreements with our directors and officers that may require the Company to indemnify these individuals against liabilities that arise by reason of their status or service as directors or officers, except as prohibited by law.

Note 8 – The Paycheck Protection Program (PPP) Loan

On May 8, 2020, the Company obtained a loan in the amount of $251 thousand (the “PPP loan”) from Bank of America (the “Lender”), pursuant to the Paycheck Protection Program (the “PPP”) under the Coronavirus Aid, Relief, and Economics Security Act (the “CARES Act”) that was signed into law in March 2020. In accordance with the PPP, the Company was permitted to use the PPP loan proceeds to fund designated expenses, including certain payroll costs, rent, utilities, and other permitted expenses. The PPP loan was evidenced by a promissory note, dated effective May 1, 2020, issued by the Company to the Lender. The PPP loan was unsecured with a 2-year term and bore interest at a rate of 1.00% per annum. The Company applied with the Small Business Administration, ("SBA") for loan forgiveness in January 2021. Payments on this note were deferred by the Lender until the forgiveness status of the loan was ascertained. In the second quarter of 2021, the Company received documentation from the SBA stating that this loan was forgiven in full. As a result, the Company recorded a $251 thousand gain on forgiveness of debt and accrued interest during the three months ended June 30, 2021.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS AND OTHER INFORMATION CONTAINED IN THIS REPORT

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements give our current expectations or forecasts of future events. You can identify these statements by the fact that they do not relate strictly to historical or current facts. You can find many (but not all) of these statements by looking for words such as “approximates,” “believes,” “hopes,” “expects,” “anticipates,” “estimates,” “projects,” “intends,” “plans,” “would,” “should,” “could,” “may,” “will” or other similar expressions in this report. In particular, these include statements relating to future actions; prospective products, applications, customers, and technologies; future performance or results of any products; anticipated expenses; and future financial results. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from our historical experience and our present expectations or projections. Factors that could cause actual results to differ materially from those discussed in the forward-looking statements include, but are not limited to:

● our limited cash, history of losses, and our expectation that we will continue to experience operating losses and negative cash flows in the near future;

● our limited operating history;

● emerging competition and advancing technology in our industry that may outpace our technology;

● changes in government regulations that could substantially reduce, or even eliminate, the need for our technology;

● customer demand for the products and services we develop;

● the impact of competitive or alternative products, technologies, and pricing;

● our ability to manufacture any products we design;

● our doing business in China and related risks with respect to intellectual property protection, currency exchange, contract enforcement and rules on foreign investment;

● the impact of a cybersecurity incident or other technology disruption;

● our ability to protect our intellectual property;

● our ability to obtain adequate financing in the future;

● our ability to retain and hire personnel with the experience and talent to develop our products and business;

● general economic conditions and events and the impact they may have on us and our potential customers;

● our ability to obtain adequate financing in the future to support our operations;

● lawsuits, investigations, and other claims by third parties or regulatory agencies, including but not limited to, the Securities and Exchange Commission, Internal Revenue Service, Financial Industry Regulatory Authority;

● the financial and operational impacts of the coronavirus pandemic on our business and results of operations, including impacts on our day-to-day operations, collaborative arrangements, revenue and marketing efforts and suppliers;

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● our success at managing the risks involved in the foregoing items; and

● other factors discussed in this report and in the section titled “Risk Factors” in our most recent Annual Report on Form 10-K.

Forward-looking statements may appear throughout this report, including, without limitation, Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” The forward-looking statements are based upon management’s beliefs and assumptions and are made as of the date of this report. We undertake no obligation to publicly update or revise any forward-looking statements included in this report. You should not place undue reliance on these forward-looking statements.

Unless otherwise stated or the context otherwise requires, the terms “ClearSign,” “we,” “us,” “our” and the “Company” refer to ClearSign Technologies Corporation and its subsidiary, ClearSign Asia Limited.

ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited consolidated condensed financial statements and related notes included elsewhere in this Quarterly Report on Form 10-Q as well as our audited financial statements and related notes included in our most recent Annual Report on Form 10-K. In addition to historical information, this discussion and analysis here and throughout this Form 10-Q contains forward-looking statements that involve risks, uncertainties, and assumptions. Our actual results may differ materially from those anticipated in these forward-looking statements due to a number of factors, including but not limited to, the risks described in the section titled “Risk Factors” in our Annual Report on Form 10-K.

OVERVIEW

We design and develop technologies for the purpose of improving key performance characteristics of combustion systems, including emission and operational performance, energy efficiency and overall cost-effectiveness. Our ClearSign Core™ technology has been proven in full scale industrial test furnaces and boilers and first customer installations are currently operating in normal commercial use. We have generated nominal revenues from operations to date to meet operating expenses.

We have incurred losses since inception totaling $84.3 million and we expect to experience operating losses and negative cash flow for the foreseeable future. We have historically financed our operations primarily through issuances of equity securities. Since inception, we have raised approximately $84.6 million in gross proceeds through the sale of our equity securities. We may need to raise additional capital in the future, however, the significant volatility in the capital markets may negatively affect our ability to raise this additional capital.

It is not possible at this time to estimate the full impact that the coronavirus pandemic will have on our business or on our potential customers, suppliers, or other business partners. However, the continued spread of the coronavirus, the measures taken by the governments of affected countries, actions taken to protect employees, the limitations placed on travel and border crossings, and the impact of the pandemic on various business activities in affected countries could adversely impact our operational results and financial condition.

In order to generate meaningful revenues, our technologies must gain market recognition and acceptance to develop sufficient recurring sales. In addition, management believes that the successful growth and operation of our business is dependent upon our ability to obtain adequate sources of funding through co-development agreements, strategic partnering agreements, or equity or debt financing to adequately support commercialization of our research and development efforts, protect intellectual property, form relationships with strategic partners and provide for working capital and general corporate purposes. There can be no assurance that we will be successful in achieving our long-term plans, or that such plans, if consummated, will result in profitable operations or enable us to continue in the long-term as a going concern.

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Our costs include employee salaries and benefits, compensation paid to consultants, materials and supplies for prototype development and manufacture, costs associated with development activities including materials, sub-contractors, travel and administration, legal and accounting expenses, sales and marketing costs, general and administrative expenses, and other costs associated with an early stage, publicly traded technology company. We currently have 14 full-time employees. Because using third party expertise and resources is more efficient than maintaining full time resources, we also expect to incur ongoing consulting expenses related to technology development and some administrative, sales and legal functions commensurate with our current level of activities.

The amount that we spend for any specific purpose may vary significantly, and could depend on a number of factors including, but not limited to, the pace of progress of our commercialization and development efforts, actual needs with respect to product testing, development and research, market conditions, and changes in or revisions to our sales and marketing strategies.

Research, development, and commercial acceptance of new technologies are, by their nature, unpredictable.  Although we undertake development and commercialization efforts with reasonable diligence, there can be no assurance that the net proceeds from our securities offerings will be sufficient to enable us to develop our technology to the extent needed to create sufficient future sales to sustain operations.  If the net proceeds from these offerings are insufficient for this purpose, we will consider other options to continue our path to commercialization, including, but not limited to, additional financing through follow-on equity offerings, debt financing, co-development agreements, sale or licensing of developed intellectual or other property, or other alternatives.

We cannot assure that our technologies will be accepted, that we will ever earn revenues sufficient to support our operations, or that we will ever be profitable. Furthermore, we have no committed source of financing, and we cannot assure that we will be able to raise money as and when we need it to continue our operations. If we cannot raise funds as and when we need them, we may be required to scale back our development plans by reducing expenditures for employees, consultants, business development and marketing efforts or to otherwise severely curtail, or even to cease, our operations.

CRITICAL ACCOUNTING POLICIES

The following discussion and analysis of financial condition and results of operations is based upon our financial statements, which have been prepared in conformity with accounting principles generally accepted in the United States of America. Certain accounting policies and estimates are particularly important to the understanding of our financial position and results of operations. These policies and estimates require the application of significant judgment by management. These estimates can be materially affected by changes from period to period as economic factors and conditions outside of our control change. As a result, they are subject to an inherent degree of uncertainty. In applying these policies, our management uses their judgment to determine the appropriate assumptions to be used in the determination of certain estimates. Those estimates are based on our historical operations, our future business plans and projected financial results, the terms of existing contracts, our observance of trends in the industry, information provided by our customers and information available from other outside sources, as appropriate. See Note 2 to our unaudited condensed consolidated financial statements included elsewhere in this report for a more complete description of our significant accounting policies.

Revenue Recognition and Cost of Goods Sold. The Company recognizes revenue and related cost of goods sold in accordance with FASB ASC 606 Revenue from Contracts with Customers (ASC 606). Revenues and cost of goods sold are recognized once the goods or services are delivered to the customer’s control or non-refundable performance obligations are satisfied. The Company’s contracts with customers generally have performance obligations and a schedule of non-refundable cancellation obligations. The contracts generally will be fully performed upon delivery of certain documents or equipment. Revenue related to the contracts is recognized following the completion of non-refundable performance obligations as defined in the contract.

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The Company’s contracts generally include progress payments from customers upon completion of defined milestones. As these payments are received, they are offset against accumulated project costs and recorded as either contract assets or contract liabilities. Upon completion of the performance obligations and collectability is determined, revenue can be recorded. For any contract in connection with which the Company is expected to incur costs in excess of the contact price, the Company accrues the estimated loss in full in the period such determination is made.

Impairment of Long-Lived Assets

The Company tests long-lived assets, consisting of fixed assets, patents, and other intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable through the estimated undiscounted cash flows expected from the use and eventual disposition of the assets. In the event an asset in not fully recoverable a loss is recognized based on the amount by which the carrying amount exceeds the fair value of the long-lived assets. Fair value is determined based on the present value of estimated expected cash flows using a discount rate commensurate with the risks involved, quoted market prices, or appraised values depending upon the nature of the assets. Losses on long-lived assets to be disposed of is determined in a similar manner, except those fair values are reduced for the cost of disposal.

Product Warranties

The Company warrants all installed products against defects in materials and workmanship, and shortcomings in performance compared to contractual guarantees for a period specified in each contract. Accruals for product warranties are based on expected warranty experience and current product performance trends which are recorded as a component of cost of sales at the time revenue is recognized. The warranty liabilities are reduced by material and labor costs during the warranty period in the periods in which the costs are incurred. The Company periodically assesses the adequacy of our recorded warranty liabilities and adjusts the amounts as necessary, and such adjustments could be material if estimates differ significantly from actual warranty expense. The warranty liabilities are included in accounts payable and accrued liabilities in the unaudited condensed consolidated balance sheets.

Research and Development

The cost of research and development is expensed as incurred. Research and development costs consist of salaries, benefits, share based compensation, consumables, and consulting fees, including costs to develop and test prototype equipment and parts. Research and development costs are offset by any funds received from strategic partners in cost sharing, collaborative projects.

Stock-Based Compensation

The costs of all employee stock options, as well as other equity-based compensation arrangements, are reflected in the unaudited, condensed consolidated financial statements based on the estimated fair value of the awards on the grant date. That cost is recognized over the period during which an employee is required to provide service in exchange for the award, or in the case of performance options, expense is recognized upon completion of a milestone as defined in the grant agreement. Stock-based compensation for stock grants to non-employees is determined as the fair value of the consideration received or the fair value of equity instruments issued, whichever is more reliably measured.

Fair Value of Financial Instruments

The Company's financial instruments primarily consist of cash and cash equivalents, accounts payable, accrued expenses and short-term investments in government securities. As of the balance sheet date, the estimated fair values of the financial instruments were not materially different from their carrying values as presented on the balance sheets. This is primarily attributed to the short maturities of these instruments.

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RESULTS OF OPERATIONS

Comparison of the Three Months Ended March 31, 2022 and 2021

Highlights of our quarter financial performance are as follows:

	For the Three Months Ended
	March 31,
(in thousands, except per share data)	2022		2021		$ Change		% Change
Revenues	$	—	$	363	$	(363)	100.0	%
Cost of goods sold		—		225	$	(225)	100.0	%
Gross Profit		—		138	$	(138)	100.0	%
Operating Expenses		1,517		2,159	$	(642)	29.7	%
Gain from sale of assets		23			$	23	NA
Other income, net		4		-	$	4	NA
Net loss	$	(1,490)	$	(2,021)	$	531	26.3	%
Basic and diluted net income per common share	$	(0.05)	$	(0.07)	$	0.02	28.6	%

Sales and Gross Profit

Consolidated revenues for the March 31, 2022 were zero compared to revenues of $363 thousand for the three months ended March 31, 2021. During the three months ended March 31, 2021, consolidated revenues included revenues from our burner product line for a sale that occurred in the United States.

Gross profit decreased by $138 thousand, or 100.0% compared to 2021. During the three months ended March 31, 2021 gross profit was generated by our burner product line.

Operating Expenses

Operating expenses consist of research and development (R&D) and general and administrative (G&A) expenses. These are addressed separately below.

R&D expenses decreased by $718 thousand or approximately 86.9% to $108 thousand for the three months ended March 31, 2022, as compared to $826 thousand during the three months ended March 31, 2021. During the three months ended March 31, 2022, we restructured our organization such that three engineers previously performing R&D functions were reassigned to business development, which shifted salaries of approximately $107 thousand to G&A expense. During the three months ended March 31, 2022, human capital and related incentive costs were also favorably impacted for headcount decreases of $123 thousand and incentive reductions of $166 thousand when compared to the three months ended March 31, 2021. In addition, we incurred $181 thousand less of product development costs as compared to three months ended March 31, 2021.

G&A expenses increased by $76 thousand or approximately 5.7% to $1,409 thousand during the three months ended March 31, 2022, as compared to $1,333 thousand during the three months ended March 31, 2021. During the three months ended March 31, 2022, we restructured our organization as discussed in more detail in previous paragraph, which resulted in an unfavorable $107 thousand dollar increase in salaries. G&A expenses were further unfavorably impacted by $122 thousand dollars for increased accounting costs. These costs related to temporary professional staff to reinforce the finance and accounting function after the death of our CFO in July 2021. G&A expenses were favorably impacted during the three months ended March 31, 2022 as a result of a $210 thousand decrease in compensation for board of director service. The decrease was due to two key factors: (i) changing payment of director compensation from stock options to restricted stock units, and (ii) deferring compensation expense as required by accounting standard ASC 718 Stock Compensation, refer to Note 6 Equity, for further details.

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Other Income

Other income for the three months ended March 31, 2022, includes a $23 thousand dollar gain from the sale of fixed assets at our Seattle office location. In January 2022, the board of directors approved the relocation of our headquarters from Seattle, Washington to Tulsa, Oklahoma. After approval, we began soliciting bids for our used lab and office equipment.

Net Loss

Net loss for the three months ended March 31, 2022, was $1,490 thousand compared to $2,021 thousand for the three months ended March 31, 2021, or an approximate 26.3% decrease. The $531 thousand decrease in net loss during the three months ended March 31, 2022 is primarily attributable to decreased human capital costs, and changing our board of directors compensation plan. Refer to our operating expenses discussion above for further details.

Liquidity and Capital Resources

At March 31, 2022, our cash and cash equivalent balance totaled $6,667 thousand compared to $7,607 thousand at December 31, 2021, a decrease of $940 thousand.

At March 31, 2022, our current assets were in excess of current liabilities resulting in working capital of $6,553 thousand as compared to $7,293 thousand at December 31, 2021.

Based on our current plans, we have sufficient funds to continue operating our business at current levels for at least 12 months from the date of issuance of this report. In order to continue business operations beyond that point, we currently anticipate that we will need to raise additional capital. Our development and general administrative costs are ongoing, and we expect to require additional funding to meet these expenses. To that end, we may undertake offerings of our securities, debt financings, selling or licensing intellectual property, or other alternatives. We filed a Form S-3 shelf registration statement with the Securities and Exchange Commission on June 27, 2019 that was declared effective on July 12, 2019. The registration statement allows us to offer common stock, preferred stock, warrants, subscription rights, debt securities and units from time to time as market conditions permit to fund the ongoing operations of the Company. Until the growth of revenue increases to a level that covers operating expenses it is the Company’s plan to continue to fund operations in this manner, although, as noted above, the significant volatility in the capital markets may negatively affect our ability to do so.

During the three months ended March 31, 2022, working capital has been funded with approximately $578 thousand in net proceeds from the ATM offering of 496 thousand shares of our common stock, offset by operating expenses. Subsequent to the three months ended March 31, 2022, the Company raised an additional $9 thousand in net proceeds from the ATM by issuing 5 thousand shares.

Operating activities for the three months ended March 31, 2022, resulted in cash outflows of $1,503 thousand, primarily due to the loss for the period of $1,490 thousand, offset with non-cash expenses of $100 thousand.

Operating activities for the three months ended March 31, 2021, resulted in cash outflows of $1,513 thousand, primarily due to the loss for the period of $2,021 thousand, offset with non-cash expenses of $771 thousand.

Investing activities for the three months ended March 31, 2022, resulted in cash outflows of $38 thousand in disbursements for fixed and intangible assets, and cash inflows of $23 thousand in proceeds from fixed asset sales, compared to cash outflows of $88 thousand in disbursements for fixed and intangible assets for the three months ended March 31, 2021.

Financing activities for the three months ended March 31, 2022, included $578 thousand in net proceeds from the sale of 496 thousand shares of our common stock through our ATM program at an average price of $1.24 per share.

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Financing activities for the three months ended March 31, 2021, included $3,393 thousand in net proceeds from the sale of 941 thousand shares of our common stock at an average price of $4.84 per share through our ATM program. The net proceeds were exclusive of $1,076 thousand that was receivable and collected after March 31, 2021. Financing activities for the three months ended March 31, 2021, also included $109 thousand from the exercise of option awards and warrants.

Off-Balance Sheet Transactions

We do not have any off-balance sheet transactions.

ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As a smaller reporting company, we are not required to provide this information.

ITEM 4.CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

We maintain disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, (the “Exchange Act”), that are designed to reasonably ensure that information required to be disclosed in our reports filed under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and principal accounting and financial officer, as appropriate, to allow timely decisions regarding required disclosure.

We carried out an evaluation under the supervision and with the participation of management, including our Chief Executive Officer (principal executive officer) and our Vice President and Controller (principal accounting and financial officer), of the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2022, the end of the period covered by this Quarterly Report on Form 10-Q. Based upon the evaluation of our disclosure controls and procedures as of March 31, 2022, our Chief Executive Officer (principal executive officer) and our Vice President and Controller (principal accounting and financial officer) concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2022 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on Effectiveness of Controls and Procedures

Our management, including our Chief Executive Officer (principal executive officer) and our Vice President and Controller (principal accounting and financial officer), does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls. The design of any system of controls is also based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or

23

procedures. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

PART II-OTHER INFORMATION

ITEM 1.LEGAL PROCEEDINGS

From time to time, we may become involved in various lawsuits and legal proceedings which arise in the ordinary course of business. However, litigation is subject to inherent uncertainties and an adverse result in these or other matters may arise from time to time that may harm our business. We are currently not aware of any such legal proceedings or claims that we believe will have a material adverse effect on our business, financial condition or operating results.

ITEM 1A.RISK FACTORS

We incorporate herein by reference the risk factors included under “Part I - Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2021, which we filed with the Securities and Exchange Commission on March 31, 2022, and the risk factors included in the reports and other documents we filed with the Securities and Exchange Commission subsequent to that date.

ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

On March 31, 2022, we issued 3,750 shares of common stock at a price per share of $1.93, the closing price of our common stock on November 19, 2021, the date of grant, from our 2013 Consultant Stock Plan to our investor relations firm, Firm IR, for services provided during the three months ended March 31, 2022. These shares were issued in reliance upon the exemption from registration provided by Section 4(a)(2) of the Securities Act of 1933, as amended, for a transaction by an issuer not involving a public offering.

ITEM 3.DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4.MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5.OTHER INFORMATION

The information set forth below is included herein for the purpose of providing the disclosure required under “Item 5.02 – Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers” of Form 8-K.

On May 11, 2022, we entered into an amendment (the “Amendment”) to the employment agreement, dated January 28, 2019 (the “Employment Agreement”), with our Chief Executive Officer, Colin James Deller, which (i) expanded the types of consideration available to satisfy Mr. Deller’s bonus compensation, from only stock options to also include cash or common stock, restricted stock, restricted stock units, performance stock or performance stock units issuable in accordance with the terms and conditions of our 2021 Equity Incentive Plan, as determined by the Compensation Committee of our Board of Directors, and (ii) increased the cash severance payment in connection with a termination of Mr. Deller’s employment, either by us upon not less than 30 days written notice or due to a Change of Control (as such term is defined in the Employment Agreement), from six months to one year of his annual base salary. The other provisions of the Employment Agreement not affected by the Amendment remain unchanged.

24

The foregoing summary of the Amendment does not purport to be complete and is qualified in its entirety by reference to the Amendment, a copy of which will be filed as an exhibit to our Quarterly Report on Form 10-Q for the quarter ending June 30, 2022.

ITEM 6.EXHIBITS

Exhibit
Number	Document
3.1	Articles of Incorporation of ClearSign Technologies Corporation (1)
3.2	Bylaws, as amended effective September 8, 2021 (2)
31.1*	Rule 13a-14(a)/15d-14(a) Certification of Principal Executive Officer
31.2*	Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer
32.1+	Section 1350 Certification of Principal Executive Officer and Principal Financial Officer
101.INS	Inline XBRL Instance Document*
101.SCH	Inline XBRL Taxonomy Extension Schema Document*
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document*
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document*
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document*
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document*
104	Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*Filed herewith

+Furnished herewith

(1) Incorporated by reference from the registrant’s Form 10-Q for the quarter ended September 30, 2019 filed with the Securities and Exchange Commission on November 13, 2019.

(2) Incorporated by reference from the registrant’s Form 8-K filed with the Securities and Exchange Commission on September 10, 2021.

25

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		CLEARSIGN TECHNOLOGIES CORPORATION
Date: May 16, 2022	By:	/s/ Colin James Deller
		Colin James Deller
		Chief Executive Officer
		(Principal Executive Officer)

By:	/s/ Brent Hinds
	Brent Hinds
	Vice President and Controller (Principal Financial and Accounting Officer)

26

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Colin James Deller, certify that:

1. I have reviewed this quarterly report on Form 10-Q of ClearSign Technologies Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15-d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including any consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 16, 2022

/s/ Colin James Deller

Colin James Deller

Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Brent Hinds, certify that:

1. I have reviewed this quarterly report on Form 10-Q of ClearSign Technologies Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15-d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including any consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 16, 2022

/s/ Brent Hinds

Brent Hinds

Vice President and Controller

(Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION

In connection with the periodic report of ClearSign Technologies Corporation (the “Company”) on Form 10-Q for the quarterly period ended March 31, 2022 as filed with the Securities and Exchange Commission (the “Report”), we, Colin James Deller, Chief Executive Officer (Principal Executive Officer) and Brent Hinds, Vice President of Finance & Controller (Principal Financial and Accounting Officer) of the Company, hereby certify as of the date hereof, solely for purposes of Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Title 18, Chapter 63, Section 1350 of the United States Code, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Exchange Act, and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

Date: May 16, 2022

/s/ Colin James Deller

Colin James Deller

Chief Executive Officer

(Principal Executive Officer)

/s/ Brent Hinds

Brent Hinds

Vice President of Finance & Controller (Principal Financial and Accounting Officer)

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of ClearSign Technologies Corporation under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2022	May 04, 2022
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity Registrant Name	CLEARSIGN TECHNOLOGIES CORPORATION
Entity File Number	001-35521
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	26-2056298
Entity Address, Address Line One	8023 E. 63rd Place, Suite 101
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74133
City Area Code	206
Local Phone Number	673-4848
Title of 12(b) Security	Common Stock
Trading Symbol	CLIR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		32,160,131
Entity Central Index Key	0001434524
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 6,667	$ 7,607
Accounts receivable, net	27	33
Contract assets	244	39
Prepaid expenses and other assets	401	345
Total current assets	7,339	8,024
Fixed assets, net	493	530
Patents and other intangible assets, net	802	799
Other assets	10	10
Total Assets	8,644	9,363
Current Liabilities:
Accounts payable and accrued liabilities	294	224
Current portion of lease liabilities	212	205
Accrued compensation and related taxes	196	218
Contract liabilities	84	84
Total current liabilities	786	731
Long Term Liabilities:
Long term lease liabilities	294	350
Total liabilities	1,080	1,081
Commitments and contingencies (note 7)
Stockholders' Equity:
Preferred stock, $0.0001 par value, zero shares issued and outstanding
Common stock, $0.0001 par value, 32,154,746 and 31,581,666 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	3	3
Additional paid-in capital	91,807	91,035
Accumulated other comprehensive income	9	9
Accumulated deficit	(84,255)	(82,765)
Total ClearSign Technologies Corporation stockholders' equity	7,564	8,282
Total equity	7,564	8,282
Total Liabilities and Equity	$ 8,644	$ 9,363

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
Condensed Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares issued	32,154,746	31,581,666
Common stock, shares outstanding	32,154,746	31,581,666

XML

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Operations
Revenues	$ 0	$ 363
Cost of goods sold		225
Gross Income		138
Operating expenses:
Research and development	108	826
General and administrative	1,409	1,333
Total operating expenses	1,517	2,159
Loss from operations	(1,517)	(2,021)
Other income
Gain from sale of assets	23
Other income, net	4
Net Loss	$ (1,490)	$ (2,021)
Net loss per share - basic	$ (0.05)	$ (0.07)
Net loss per share - fully diluted	$ (0.05)	$ (0.07)
Weighted average number of shares outstanding - basic	31,826,221	30,526,571
Weighted average number of shares outstanding - fully diluted	31,826,221	30,526,571

XML

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Other Comprehensive Income	Accumulated Deficit	Total ClearSign Technologies Corp. Stockholders' Equity	Noncontrolling Interest	Total
Balance at the beginning at Dec. 31, 2020	$ 3	$ 84,411		$ (74,874)	$ 9,540	$ 1	$ 9,541
Balances (in shares) at Dec. 31, 2020	30,077
Shares issued upon exercise of options ($1.90 per share)		2			2		2
Shares issued upon exercise of options ($1.90 per share) (in shares)	1
Shares issued upon exercise of options ($3.80 per share)		36			36		36
Shares issued upon exercise of options ($3.80 per share) (in shares)	9
Shares issued upon exercise of options ($1.21 per share)		4			4		4
Shares issued upon exercise of options ($1.21 per share) (in shares)	3
Shares issued upon exercise of warrants ($1.80 per share)		67			67		67
Shares issued upon exercise of warrants ($1.80 per share) (in shares)	38
Fair value of stock options issued for board service		210			210		210
Fair value of stock issued in payment of accrued compensation		217			217		217
Fair value of stock issued in payment of accrued compensation (in shares)	64
Share based compensation		410			410		410
Proceeds receivable from At-The Market issuance		(1,076)			(1,076)		(1,076)
Shares issued through use of At The Market issuance		4,469			4,469		4,469
Shares issued through use of At The Market issuance (in shares)	941
Shares issued for services		9			9		9
Shares issued for services (in shares)	4
Net loss				(2,021)	(2,021)		(2,021)
Balance at the end at Mar. 31, 2021	$ 3	88,759		(76,895)	11,867	$ 1	11,868
Balances (in shares) at Mar. 31, 2021	31,137
Balance at the beginning at Dec. 31, 2021	$ 3	91,035	$ 9	(82,765)	8,282		8,282
Balances (in shares) at Dec. 31, 2021	31,582
Fair value of stock issued in payment of accrued compensation		95			95		95
Fair value of stock issued in payment of accrued compensation (in shares)	66
Share based compensation		80			80		80
Share based compensation (in shares)	3
Shares issued upon exercise of options ($2.93 per share) (in shares)	3
Shares issued upon exercise of options ($0.89 per share) (in shares)	1
Fair value of stock options granted in payment of accrued compensation		12			12		12
Shares issued through use of At The Market issuance		578			578		578
Shares issued through use of At The Market issuance (in shares)	496
Shares issued for services		7			7		7
Shares issued for services (in shares)	4
Net loss				(1,490)	(1,490)		(1,490)
Balance at the end at Mar. 31, 2022	$ 3	$ 91,807	$ 9	$ (84,255)	$ 7,564		$ 7,564
Balances (in shares) at Mar. 31, 2022	32,155

XML

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Stockholders' Equity
Common stock for options exercise, 0.89 per share issue	$ 0.89
Common stock for options exercise, 2.93 per share issue	2.93
Shares issued through at the market issuance 1.24 average per share	1.24
Common stock for services 1.93 per share	$ 1.93
Common stock for options exercise, 1.90 per share issue		$ 1.90
Common stock for options exercise, 3.80 per share issue		3.80
Common stock for options exercise, 1.21 per share issue		1.21
Common stock for options exercise, 1.80 per share issue		1.80
Shares issued through at the market issuance 4.84 average per share		4.84
Common stock for services 2.33 per share		$ 2.33

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (1,490)	$ (2,021)
Adjustments to reconcile net loss to net cash used in operating activities:
Common stock issued for services	7	9
Share based compensation	80	620
Depreciation and amortization	36	46
Gain from sale of fixed assets	(23)
Reserve for prepaid materials		96
Change in operating assets and liabilities:
Contract assets	(205)	(247)
Accounts receivable	6	(124)
Prepaid expenses and other assets	(56)	127
Accounts payable and accrued liabilities	57	2
Accrued compensation and related taxes	85	25
Contract liabilities		(46)
Net cash used in operating activities	(1,503)	(1,513)
Cash flows from investing activities:
Acquisition of fixed assets	(5)	(54)
Disbursements for patents and other intangible assets	(33)	(34)
Proceeds from sale of fixed assets	23
Net cash used in investing activities	(15)	(88)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of offering costs	578	3,393
Proceeds from exercise of stock options and warrants		109
Net cash provided by financing activities	578	3,502
Net change in cash and cash equivalents	(940)	1,901
Cash and cash equivalents, beginning of period	7,607	8,824
Cash and cash equivalents, end of period	6,667	10,725
Supplemental disclosure of cash flow information:
Officer and employee equity awards for prior year accrued compensation	$ 107	$ 217

XML

Organization and Description of Business

3 Months Ended

Mar. 31, 2022

Organization and Description of Business

Organization and Description of Business

Note 1 – Organization and Description of Business

ClearSign Technologies Corporation (“ClearSign” or the “Company”) designs and develops products and technologies that have been shown to significantly improve key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety, and overall cost-effectiveness. The Company’s patented technologies are designed to be embedded in established OEM products as ClearSign Core™ and ClearSign Eye™ and other sensing configurations in order to enhance the performance of combustion systems and fuel safety systems in a broad range of markets. These markets include energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, transport and power industries. The Company’s primary technology is its ClearSign Core technology, which achieves very low emissions without the need of external flue gas recirculation, selective catalytic reduction, or higher excess air operation.

The Company was incorporated in the State of Washington in 2008. During January 2022, the Company relocated its headquarters from Seattle, Washington to Tulsa, Oklahoma. On July 28, 2017, the Company incorporated a subsidiary, ClearSign Asia Limited, in Hong Kong to represent the Company’s business and technological interests throughout Asia. Through ClearSign Asia Limited, the Company has established a Wholly Foreign Owned Enterprise (WFOE) in China – ClearSign Combustion (Beijing) Environmental Technologies Co., LTD.

Unless otherwise stated or the context otherwise requires, the terms ClearSign and the Company refer to ClearSign Technologies Corporation and its subsidiary, ClearSign Asia Limited.

Liquidity

The Company's financial statements have been presented on the basis that it is a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company’s technologies are currently in field development, but with nominal fully operational commercial installations, and have generated nominal revenues from operations to date to meet operating expenses. In order to generate meaningful revenues, the technologies must be fully developed, gain market recognition and acceptance, and develop a critical level of successful sales and product installations.

The Company has recently financed its operations primarily through issuances of equity securities including $6.1 million in gross proceeds raised from its At-The-Market (ATM) program in which the Company issued a total of 1.6 million shares of common stock at a weighted average price of $3.85 per share as of March 31, 2022. Costs associated with the ATM program totaled approximately $227 thousand and the Company received net cash proceeds approximating $5.9 million.

The Company has incurred losses since its inception totaling $84.3 million and expects to experience operating losses and negative cash flows for the foreseeable future. Management believes that the successful growth and operation of the Company’s business is dependent upon our ability to obtain adequate sources of funding through co-development agreements, strategic partnering agreements, or equity or debt financing to adequately support product commercialization efforts, protect intellectual property, form relationships with strategic partners, and provide for working capital and general corporate purposes. There can be no assurance that the Company will be successful in achieving its long-term plans as set forth above, or that such plans, if consummated, will result in profitable operations or enable the Company to continue in the long-term as a going concern.

XML

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2022

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Note 2 – Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”) for Form 10-Q. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet at December 31, 2021 has been derived from the Company’s audited financial statements as of that date.

In the opinion of management, these condensed consolidated financial statements reflect all normal recurring and other adjustments necessary for a fair presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Operating results for interim periods are not necessarily indicative of operating results for an entire fiscal year or any other future periods.

The accompanying unaudited condensed consolidated financial statements include the accounts of ClearSign and its subsidiary. Intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Revenue Recognition and Cost of Sales

The Company recognizes revenue and related cost of goods sold in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification 606 Revenue from Contracts with Customers (ASC 606). When applying ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the promises and performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the performance obligations are satisfied. Revenues and cost of goods sold are recognized once the goods or services are delivered to the customer’s control or non-refundable performance obligations are satisfied. The Company’s contracts with customers generally have performance obligations and a schedule of non-refundable cancellation obligations. The contracts generally will be fully performed upon delivery of certain drawings or equipment. Revenue related to the contracts is recognized following the completion of non-refundable performance obligations as defined in the contract.

The Company’s contracts generally include progress payments from the customer upon completion of defined milestones. As these payments are received, they are offset against accumulated project costs and recorded as either contract assets or contract liabilities. Upon completion of the performance obligations and collectability is determined, revenue is recorded. For any contract that is expected to incur costs in excess of the contract price, the Company accrues the estimated loss in full in the period such determination is made.

Contract Acquisition Costs and Practical Expedients

For contracts that have a duration of less than one year, the Company follows ASC 606, Narrow Scope Improvements and Practical Expedients, and expenses those costs when incurred. For contracts with a life exceeding one year, the Company records those costs when performance obligations related to the contract are completed. The Company generally expenses sales commissions when incurred. The Company amortizes those costs within general and administrative expenses over the life of the contract.

Product Warranties

The Company warrants all installed products against defects in materials and workmanship for a period specified in each contract by replacing failed parts. Accruals for product warranties are based on historical or expected warranty experience and current product performance trends and are recorded as a component of cost of sales at the time revenue is recognized. The warranty liabilities are reduced by material and labor costs used to replace parts over the warranty period in the periods in which the costs are incurred. The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary, and such adjustments could be material in the future if estimates differ significantly from actual warranty expense. Product warranties are included in accrued liabilities in the balance sheets.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash on deposit in a checking and savings account.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivables are recorded at the contractual invoiced amount. An allowance for doubtful accounts is established, as necessary, based on past experience and management’s judgment. The determination of the collectability of amounts due from customers require the Company to make judgments regarding future events and trends. Allowances for doubtful accounts are determined based on assessing the Company’s portfolio on an individual customer and on an overall basis. This process consists of a review of historical collection experience, current aging status of the customer accounts, and the financial condition of the Company’s customers. Based on a review of these factors, the Company may establish or adjust the allowance for specific customers and the accounts receivable portfolio as a whole.

Fixed Assets and Leases

Fixed assets are recorded at cost. Leases are recorded in accordance with FASB ASC 842, Leases. For those leases with a term greater than one year, the Company recognizes a right-of-use asset and a lease liability measured at the present value of the lease payments at the time of the lease inception or modification. Lease costs are recognized in the income statement over the lease term on a straight-line basis. Leases with a term of 1 year or less are considered short term leases with rent expense recognized over the lease term. Depreciation is computed using the straight-line method over the estimated useful lives of the respective lease assets. Leasehold improvements are depreciated over the life of the lease or their useful life, whichever is shorter. All other fixed assets are depreciated over three to four years. Maintenance and repairs are expensed as incurred.

Patents and Trademarks

Third-party expenses related to patents and trademarks are recorded at cost, less accumulated amortization. Amortization is computed using the straight-line method over the estimated useful lives of the assets once they are awarded. Patent application costs are deferred pending the outcome of patent and trademark applications. Costs associated with unsuccessful patent applications and abandoned intellectual property are expensed when determined to have no continuing value in current business activity. We evaluate the recoverability of the carrying values of intangible assets each reporting period.

Impairment of Long-Lived Assets

The Company tests long-lived assets, consisting of fixed assets, patents, trademarks, and other intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable through the estimated undiscounted cash flows expected from the use and eventual disposition of the assets. In the event an asset is not fully recoverable a loss is recognized based on the amount by which the carrying amount exceeds the fair value of the long-lived assets. Fair value is determined based on the present value of estimated expected cash flows using a discount rate commensurate with the risks involved, quoted market prices, or appraised values depending upon the nature of the assets. Losses on long-lived assets to be disposed of is determined in a similar manner, except those fair values are reduced for the cost of disposal.

Fair Value of Financial Instruments

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial assets and liabilities within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs used to establish fair value are the following:

● Level 1 – Quoted prices in active markets for identical assets or liabilities.

● Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

● Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company’s financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses. As of the balance sheet dates, the estimated fair values of the financial instruments were not materially different from their carrying values as presented on the balance sheets. This is primarily attributable to the short-term nature of these instruments.

The Company did not identify any other recurring or non-recurring assets and liabilities that are required to be presented in the balance sheets at fair value.

Research and Development

The cost of research and development is expensed as incurred. Research and development costs consist of salaries, benefits, share based compensation, consumables, and consulting fees, including costs to develop and test prototype equipment and parts. Research and Development costs have been offset by funds received, if any, from strategic partners in cost sharing, collaborative projects. During the three months ended March 31, 2022 and March 31, 2021, the Company did not receive any funds from such arrangements to partially offset funding for research and development activities.

Income Taxes

The Company accounts for income taxes using an asset and liability approach which allows for the recognition and measurement of deferred tax assets based upon the likelihood of realization of tax benefits in future years. Under the asset and liability approach, deferred taxes are provided for the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. A valuation allowance is provided for deferred tax assets if it is more likely than not the Company would not be able to realize their benefits, or that future deductibility is uncertain. Tax benefits are recognized only if it is more likely than not that the tax benefits will be utilized in the foreseeable future.

Share-Based Compensation

The costs of all employee stock options, as well as other equity-based compensation arrangements, are reflected in the unaudited condensed consolidated financial statements based on the estimated fair value of the awards on the grant date. That cost is recognized over the period during which an employee is required to provide service in exchange for the award, or in the case of performance options, expense is recognized upon completion of a milestone as defined in the grant agreement. Share-based compensation for stock grants to non-employees is determined as the fair value of the consideration received or the fair value of equity instruments issued, whichever is more reliably measured.

Foreign Operations

The accompanying unaudited condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021 include assets amounting to approximately $227 thousand and $274 thousand, respectively, relating to operations of ClearSign Asia Limited. The Beijing registered capital requirement is $350 thousand, which is required to be paid by 2027, and of which none has been paid to date. It is always possible that unanticipated events in foreign countries could disrupt the Company’s operations, and since the first quarter of 2020 this has been and currently continues to be the case with the effects of the recent COVID-19 pandemic.

Foreign Currency

Assets and liabilities of ClearSign Asia Limited with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using rates that approximate those in effect during the period. The resulting translation adjustments are included in the Company’s condensed consolidated balance sheets in the stockholders’ equity section as a component of accumulated other comprehensive gain (loss).

Noncontrolling Interest

The subsidiary of the Company has a minority shareholder agreement representing an ownership interest of 1.00% of ClearSign Asia Limited. The Company accounts for this noncontrolling interest pursuant to FASB ASC 810 whereby gains and losses in a subsidiary with a noncontrolling interest are allocated to the noncontrolling interest based on the ownership percentage of the noncontrolling interest, even if that allocation results in a deficit noncontrolling interest balance.

Net Loss per Common Share

Basic loss per share is computed by dividing loss available to common stockholders by the weighted-average number of common shares outstanding. Diluted loss per share is computed similar to basic loss per share except that the denominator is increased to include additional common shares available upon exercise of stock options and warrants using the treasury stock method, except for periods for which no common share equivalents are included because their effect would be anti-dilutive. At March 31, 2022 and December 31, 2021, potentially dilutive shares outstanding amounted to 3.3 million and 3.1 million, respectively.

Recently Issued Accounting Pronouncements

In June 2017, the FASB issued an Accounting Standards Update (ASU) 2016-13, Financial Instruments (Topic 326) Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. The standard replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. ASU 2016-13, and related amendments, are effective for fiscal years beginning after December 15, 2022. The Company has not completed its assessment of the standard but does not expect the adoption to have a material impact on its financial statements.

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, which outlines disclosure requirements for entities that receive assistance from a government body. ASU 2021-10, and related amendments, are affective for annual reports beginning after December 15, 2021. The Company does not expect the adoption to have a material impact on its financial statements.

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Fixed Assets

3 Months Ended

Mar. 31, 2022

Fixed Assets

Fixed Assets

Note 3  Fixed Assets

Fixed Assets

Fixed assets are summarized as follows:

	March 31,		December 31,
(in thousands)	2022		2021
Machinery and equipment	$	666	$	722
Office furniture and equipment		224		218
Leasehold improvements		192		192
		1,082		1,132
Accumulated depreciation and amortization		(1,006)		(1,055)
		76		77
Operating lease ROU assets, net		417		453
Total	$	493	$	530

Depreciation expense for the three months ended March 31, 2022 and 2021 totaled $7 thousand and $8 thousand, respectively.

Leases

The Company leases office space in Seattle, Washington, Tulsa, Oklahoma and Beijing, China. The Beijing lease is treated as a short-term lease. The monthly rent for the Beijing lease is approximately $5 thousand.

The Seattle and Tulsa leases are classified as operating leases, with remaining terms ranging from one to six years; contractual language requires renewal negotiations to occur at or near termination. These leases are normal and customary for office space, in that, contractual guarantees exist requiring the lessee to return the premises to its original functional state. In 2021, the Company accrued an estimated cost of $32 thousand to prepare for the restoration of the Seattle office. The Company plans to exit the Seattle lease on or before contract termination as part of our headquarters

move from Seattle to Tulsa. In preparation for this move, the Company entered into the Tulsa operating lease agreement in April 2021.

The Seattle and Tulsa leases contain fixed annual lease payments that increase annually by factors that range between 2% to 3%. Total monthly minimum rent is approximately $24 thousand. Contractual agreements contain expiration dates ranging from less than twelve months to less than six years.

Supplemental balance sheet information related to operating leases is as follows:

		March 31,		December 31,
(in thousands)		2022		2021
Operating lease ROU assets, net	$	417	$	453
Lease Liabilities:
Current lease liabilities	$	212	$	205
Long term lease liabilities		294		350
Total lease liabilities	$	506	$	555

		For the Three Months Ended
		March 31,
		2022			2021
Operating lease costs	$	57		$	51
Supplemental cash flow information related to leases is as follows:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	57		$	53
Non-cash impact of new leases and lease modifications
New operating lease liabilities	$	—		$	320
Weighted average remaining lease term (in years):		2.6
Weighted average discount rate:		5.8	%

Minimum future payments under the Company’s lease liabilities at March 31, 2022 are as follows:

	Discounted		Payments
	lease		due under
(in thousands)	liability		lease
	payments		agreements
2022 (remaining 9 months)	$	158	$	176
2023		122		136
2024		54		64
2025		59		66
2026		63		67
Thereafter		50		51
Total	$	506	$	560

At March 31, 2022, $56 thousand of our future minimum lease payments represented interest.

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Patents and Other Intangible Assets

3 Months Ended

Mar. 31, 2022

Patents and Other Intangible Assets

Patents and Other Intangible Assets

Note 4 – Patents and Other Intangible Assets

Patents and other intangible assets are summarized as follows:

	March 31,		December 31,
(in thousands)	2022		2021
Patents
Patents pending	$	473	$	439
Issued patents		577		577
		1,050		1,016
Trademarks
Trademarks pending		1		3
Registered trademarks		95		94
		96		97
Other		8		8
		1,154		1,121
Accumulated amortization		(352)		(322)
	$	802	$	799

Future amortization expense associated with issued patents and registered trademarks as of March 31, 2022 is as follows:

(in thousands)
2022 (remaining 9 months)	$	88
2023		96
2024		74
2025		42
2026		9
Thereafter		11
	$	320

The amortization life for patents ranges between three to five years, with trademark lives set at ten years. The Company does not amortize patents or trademarks classified as pending.

During the three months ended March 31, 2022 and 2021, the Company assessed its patent and trademark assets. The Company also evaluated its strategic approach to the pursuit and protection of its intellectual property. It is the intent of the Company to continue to pursue intellectual property protection.

If the Company identifies certain assets where the intellectual property does not directly align with our core technology, we will impair the intangible asset and write-off any monies to research and development expense.

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Revenue, Contract Assets and Contract Liabilities

3 Months Ended

Mar. 31, 2022

Revenue, Contract Assets and Contract Liabilities

Revenue, Contract Assets and Contract Liabilities

Note 5 – Revenue, Contract Assets and Contract Liabilities

The Company recognized no revenues during the three months ended March 31, 2022 and $363 thousand of revenue during the three months ended March 31, 2021 from the completion and delivery of a burner under a product contract with an infrastructure company.

The Company did not record any cost of goods sold for the three months ended March 31, 2022. During the three months ended March 31, 2021, the Company recognized cost of goods sold of $250 thousand from the burner contract. Additionally, the Company recognized $18 thousand in cost of goods sold on a contract that the Company estimated would show a loss upon completion, and $8 thousand in residual costs associated with a contract that was completed during 2020. The recognized cost of goods sold was offset by adjustments totaling $51 thousand related to the reversal of accrual for product warranties that expired on three completed projects from the year 2018.

The Company had contract assets of $244 thousand and $39 thousand at March 31, 2022 and December 31, 2021, respectively. The Company had contract liabilities of $84 thousand at March 31, 2022 and December 31, 2021.

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Equity

3 Months Ended

Mar. 31, 2022

Equity

Equity

Note 6 – Equity

Common Stock and Preferred Stock

The Company is authorized to issue 62.5 million shares of common stock and 2.0 million shares of preferred stock. Preferences, limitations, voting powers and relative rights of any preferred stock to be issued may be determined by the Company’s Board of Directors. The Company has not issued any shares of preferred stock.

In July 2018, the Company completed a private equity offering and executed a Stock Purchase Agreement with clirSPV, LLC which permits participation in future capital raising transactions (Participation Right) on the same terms as other investors participating in such transactions. The Participation Right will expire on December 31, 2023. In no event may the Participation Right be exercised to the extent it would cause clirSPV, LLC or any of its affiliates to beneficially own 20% or more of the Company’s then outstanding common stock or hold shares with 20% or more of the voting power.

During the three months ended March 31, 2022, the Company issued approximately 496 thousand shares of its common stock at an average price of $1.24 per share for gross proceeds of approximately $614 thousand pursuant to an At-The-Market (ATM) Offering Sales Agreement with Virtu Americas LLC, as sales agent pursuant to which it may sell shares of common stock with an aggregate offering price of up to $15.0 million. As of March 31, 2022, the Company has issued approximately 1.6 million shares of common stock under the ATM program, at an average price of $3.85 per share. Gross proceeds totaled approximately $6.1 million and net cash proceeds was approximately $5.9 million.

Equity Incentive Plan

On June 17, 2021, the Company's shareholders approved and the Company adopted the ClearSign Technologies Corporation 2021 Equity Incentive Plan (2021 Plan) which permits the Company to grant Incentive Stock Options, Non-statutory Stock Options, Stock Appreciation Rights, Restricted Stock, Restricted Stock Units, Performance Units, and Performance Shares, to eligible participants, which includes employees, directors and consultants. The Compensation Committee of the Board of Directors is authorized to administer the 2021 Plan.

The 2021 Plan provides for an annual increase in available shares equal to the lessor of (i) 10% of the aggregate number of shares of Common Stock issued by the Company in the prior fiscal year; or (ii) such number provided by the Compensation Committee; provided, however, that the total cumulative increase in the number of shares available for issuance pursuant to this automatic share increase shall not exceed 400 thousand shares of common stock. In 2022, the board of directors approved an increase of 150,423 shares.

Ending balances of the Plans are as follows:

	March 31,	December 31,
(in thousands)	2022	2021
Outstanding options and restricted stock units	3,307	3,076
Reserved but unissued shares under the Plans	2,758	2,901
Total authorized shares under the Plans	6,065	5,977

Stock Options

Under the terms of the 2021 Plan, incentive stock options and nonstatutory stock options must have an exercise price at or above the fair market value on the date of the grant. At the time of grant, the Company will determine the period within which the option may be exercised and will specify any conditions that must be satisfied before the option vests and may be exercised. The Company estimates the fair value of stock options on the date of grant using the Black-Scholes option-pricing model.

As permitted by SEC Staff Accounting Bulletin (SAB) 107, management utilized the simplified approach to estimate the expected term of the options, which represents the period of time that options granted are expected to be outstanding. Expected volatility has been determined through the Company’s historical stock price volatility. The Company has not made an estimate of forfeitures at the time of the grant, but rather accounts for forfeitures at the time they occur. The risk-free rate for periods within the expected life of the option is based on the U.S. Treasury yield in effect at the time of grant. The Company has never declared or paid dividends and has no plans to do so in the foreseeable future.

The following weighted-average assumptions were utilized in the calculation of the fair value of stock options:

	March 31,
	2022
Expected life	5.71 years
Weighted average volatility	77.64	%
Weighted average risk-free interest rate	1.39	%
Expected dividend rate	0	%

Compensation expense for stock option awards was $42 thousand and $410 thousand for the three months ended March 31, 2022 and 2021, respectively.

A summary of the Company’s stock option activity and changes is as follows:

	March 31,
	2022
				Weighted
				Average
	Options to	Weighted		Remaining
	Purchase	Average		Contractual
	Common	Exercise		Life (in
(in thousands)	Stock	Price		years)
Outstanding at January 1	2,964	$	2.06	6.89
Granted	88	$	1.26	9.76
Exercised	(3)	$	0.89	—
Forfeited/Expired	(10)	$	2.93	—
Outstanding at March 31	3,039	$	2.03	6.76
Exercisable at March 31	2,202	$	1.71	6.05

The estimated aggregate pretax intrinsic value of the Company’s outstanding vested stock options at March 31, 2022 is $848 thousand. The intrinsic value is the difference between the Company’s common stock price and the option exercise prices multiplied by the number of in-the-money options. This amount changes based on the fair value of the Company’s common stock.

At March 31, 2022, there was $1.8 million of total unrecognized compensation cost related to non-vested stock option-based compensation arrangements. Vesting criteria ranges from time-based to performance-based. The Company records costs for time-based arrangements ratably across the timeframe, whereas performance-based arrangements require management to continually evaluate predetermined goals against actual circumstances.

Restricted Stock Units

The Company approved compensation for board service to be paid to its independent directors in restricted stock units (“RSUs”) under the 2021 Plan. Compensation is earned on a quarterly basis with the target value of compensation set at $85 thousand per quarter. A RSU grant is to be awarded to each independent director in the beginning of the quarter in which services will be rendered, and the number of RSUs granted is to be based on the trading value of the Company’s stock on the date of the award.

The vesting of the RSU grants is contingent upon the occurrence of one of four future events which the Company cannot predict or control. Accordingly, stock based compensation has not been recognized for services performed during each of the three months ended March 31, 2022 or 2021 in accordance with FASB Accounting Standards Codification, Topic 718, Compensation-Stock Compensation, (ASC 718). During the three months ended March 31, 2022, the Company issued 59 thousand RSUs for board services amounting to $85 thousand of unrecognized compensation.

During January 2022, the Company issued retention bonuses for employees in the form of RSUs. These awards vest 12 months from the date of award for services rendered in 2022. During the three months ended March 31, 2022, the Company issued 97 thousand RSUs to employees amounting to $35 thousand of recognized compensation and $105 thousand for unrecognized compensation.

Stock Grants

During the three months ended March 31, 2022, the Company issued 66 thousand shares of common stock with a fair value of $1.44 per share to its employees. These shares were issued in lieu of cash for payment of 2021 accrued bonuses totaling $125 thousand that were recorded during the year ended December 31, 2021. In addition, the Company issued 3 thousand shares for a one-time $3 thousand bonus to one employee in recognition of their performance.

Consultant Stock Plan

The 2013 Consultant Stock Plan (the Consultant Plan) provides for the granting of shares of common stock to consultants who provide services related to capital raising, investor relations, and making a market in or promoting the Company’s securities. The Company’s officers, employees, and board members are not entitled to receive grants from the Consultant Plan. The Compensation Committee of the Board of Directors is authorized to administer the Consultant Plan and establish the grant terms. The Consultant Plan provides for quarterly increases in the available number of authorized shares equal to the lesser of 1% of any new shares issued by the Company during the quarter immediately prior to the adjustment date or such lesser amount as the Board of Directors shall determine.

The Consultant Plan activity and change is as follows:

	March 31,
(in thousands)	2022
Reserved but unissued shares January 1		211
Grants		(4)
Reserved but unissued shares		207

The Consultant Plan compensation expense is summarized as follows:

	For the Three Months Ended
	March 31,
	2022		2021
Compensation Expense	$	7	$	9
Weighted Average Value Per Share	$	1.93	$	2.33

Inducement Stock Options

Pursuant to the rules of The Nasdaq Stock Market, and in compliance with those rules, the Company may issue equity awards, including stock options, as an inducement to an individual to accept employment with the Company. Inducement awards need not be approved by the Company's shareholders. During the year ended December 31, 2019, the Company granted 341 thousand non-qualified stock options to its Chief Executive Officer. The fair value of the non-qualified stock options estimated on the date of grant using the Black-Scholes valuation model was $176 thousand. The compensation expense recognized for these awards for the three months ended March 31, 2022 and 2021 was zero and $13 thousand, respectively.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies

Commitments and Contingencies

Note 7 – Commitments and Contingencies

Litigation

From time to time the Company may become involved in various lawsuits and legal proceedings which arise in the ordinary course of business. Litigation is subject to inherent uncertainties and an adverse result in any such matter may harm the Company’s business. As of the date of this report, the Company is not a party to any material pending legal proceedings or claims that the Company believes will have a material adverse effect on the business, financial condition or operating results.

Indemnification Agreements

The Company maintains indemnification agreements with our directors and officers that may require the Company to indemnify these individuals against liabilities that arise by reason of their status or service as directors or officers, except as prohibited by law.

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The Paycheck Protection Program (PPP) Loan

3 Months Ended

Mar. 31, 2022

The Paycheck Protection Program (PPP) Loan

The Paycheck Protection Program (PPP) Loan

Note 8 – The Paycheck Protection Program (PPP) Loan

On May 8, 2020, the Company obtained a loan in the amount of $251 thousand (the “PPP loan”) from Bank of America (the “Lender”), pursuant to the Paycheck Protection Program (the “PPP”) under the Coronavirus Aid, Relief, and Economics Security Act (the “CARES Act”) that was signed into law in March 2020. In accordance with the PPP, the Company was permitted to use the PPP loan proceeds to fund designated expenses, including certain payroll costs, rent, utilities, and other permitted expenses. The PPP loan was evidenced by a promissory note, dated effective May 1, 2020, issued by the Company to the Lender. The PPP loan was unsecured with a 2-year term and bore interest at a rate of 1.00% per annum. The Company applied with the Small Business Administration, ("SBA") for loan forgiveness in January 2021. Payments on this note were deferred by the Lender until the forgiveness status of the loan was ascertained. In the second quarter of 2021, the Company received documentation from the SBA stating that this loan was forgiven in full. As a result, the Company recorded a $251 thousand gain on forgiveness of debt and accrued interest during the three months ended June 30, 2021.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Summary of Significant Accounting Policies

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”) for Form 10-Q. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet at December 31, 2021 has been derived from the Company’s audited financial statements as of that date.

In the opinion of management, these condensed consolidated financial statements reflect all normal recurring and other adjustments necessary for a fair presentation. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Operating results for interim periods are not necessarily indicative of operating results for an entire fiscal year or any other future periods.

The accompanying unaudited condensed consolidated financial statements include the accounts of ClearSign and its subsidiary. Intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Revenue Recognition and Cost of Sales

Revenue Recognition and Cost of Sales

The Company recognizes revenue and related cost of goods sold in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification 606 Revenue from Contracts with Customers (ASC 606). When applying ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the promises and performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the performance obligations are satisfied. Revenues and cost of goods sold are recognized once the goods or services are delivered to the customer’s control or non-refundable performance obligations are satisfied. The Company’s contracts with customers generally have performance obligations and a schedule of non-refundable cancellation obligations. The contracts generally will be fully performed upon delivery of certain drawings or equipment. Revenue related to the contracts is recognized following the completion of non-refundable performance obligations as defined in the contract.

The Company’s contracts generally include progress payments from the customer upon completion of defined milestones. As these payments are received, they are offset against accumulated project costs and recorded as either contract assets or contract liabilities. Upon completion of the performance obligations and collectability is determined, revenue is recorded. For any contract that is expected to incur costs in excess of the contract price, the Company accrues the estimated loss in full in the period such determination is made.

Contract Acquisition Costs and Practical Expedients

Contract Acquisition Costs and Practical Expedients

For contracts that have a duration of less than one year, the Company follows ASC 606, Narrow Scope Improvements and Practical Expedients, and expenses those costs when incurred. For contracts with a life exceeding one year, the Company records those costs when performance obligations related to the contract are completed. The Company generally expenses sales commissions when incurred. The Company amortizes those costs within general and administrative expenses over the life of the contract.

Product Warranties

Product Warranties

The Company warrants all installed products against defects in materials and workmanship for a period specified in each contract by replacing failed parts. Accruals for product warranties are based on historical or expected warranty experience and current product performance trends and are recorded as a component of cost of sales at the time revenue is recognized. The warranty liabilities are reduced by material and labor costs used to replace parts over the warranty period in the periods in which the costs are incurred. The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary, and such adjustments could be material in the future if estimates differ significantly from actual warranty expense. Product warranties are included in accrued liabilities in the balance sheets.

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents consist of cash on deposit in a checking and savings account.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivables are recorded at the contractual invoiced amount. An allowance for doubtful accounts is established, as necessary, based on past experience and management’s judgment. The determination of the collectability of amounts due from customers require the Company to make judgments regarding future events and trends. Allowances for doubtful accounts are determined based on assessing the Company’s portfolio on an individual customer and on an overall basis. This process consists of a review of historical collection experience, current aging status of the customer accounts, and the financial condition of the Company’s customers. Based on a review of these factors, the Company may establish or adjust the allowance for specific customers and the accounts receivable portfolio as a whole.

Fixed Assets and Leases

Fixed Assets and Leases

Fixed assets are recorded at cost. Leases are recorded in accordance with FASB ASC 842, Leases. For those leases with a term greater than one year, the Company recognizes a right-of-use asset and a lease liability measured at the present value of the lease payments at the time of the lease inception or modification. Lease costs are recognized in the income statement over the lease term on a straight-line basis. Leases with a term of 1 year or less are considered short term leases with rent expense recognized over the lease term. Depreciation is computed using the straight-line method over the estimated useful lives of the respective lease assets. Leasehold improvements are depreciated over the life of the lease or their useful life, whichever is shorter. All other fixed assets are depreciated over three to four years. Maintenance and repairs are expensed as incurred.

Patents and Trademarks

Patents and Trademarks

Third-party expenses related to patents and trademarks are recorded at cost, less accumulated amortization. Amortization is computed using the straight-line method over the estimated useful lives of the assets once they are awarded. Patent application costs are deferred pending the outcome of patent and trademark applications. Costs associated with unsuccessful patent applications and abandoned intellectual property are expensed when determined to have no continuing value in current business activity. We evaluate the recoverability of the carrying values of intangible assets each reporting period.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets

The Company tests long-lived assets, consisting of fixed assets, patents, trademarks, and other intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable through the estimated undiscounted cash flows expected from the use and eventual disposition of the assets. In the event an asset is not fully recoverable a loss is recognized based on the amount by which the carrying amount exceeds the fair value of the long-lived assets. Fair value is determined based on the present value of estimated expected cash flows using a discount rate commensurate with the risks involved, quoted market prices, or appraised values depending upon the nature of the assets. Losses on long-lived assets to be disposed of is determined in a similar manner, except those fair values are reduced for the cost of disposal.

Fair Value of Financial Instruments

Fair Value of Financial Instruments

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial assets and liabilities within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs used to establish fair value are the following:

● Level 1 – Quoted prices in active markets for identical assets or liabilities.

● Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and

● Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company’s financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses. As of the balance sheet dates, the estimated fair values of the financial instruments were not materially different from their carrying values as presented on the balance sheets. This is primarily attributable to the short-term nature of these instruments.

The Company did not identify any other recurring or non-recurring assets and liabilities that are required to be presented in the balance sheets at fair value.

Research and Development

Research and Development

The cost of research and development is expensed as incurred. Research and development costs consist of salaries, benefits, share based compensation, consumables, and consulting fees, including costs to develop and test prototype equipment and parts. Research and Development costs have been offset by funds received, if any, from strategic partners in cost sharing, collaborative projects. During the three months ended March 31, 2022 and March 31, 2021, the Company did not receive any funds from such arrangements to partially offset funding for research and development activities.

Income Taxes

Income Taxes

The Company accounts for income taxes using an asset and liability approach which allows for the recognition and measurement of deferred tax assets based upon the likelihood of realization of tax benefits in future years. Under the asset and liability approach, deferred taxes are provided for the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. A valuation allowance is provided for deferred tax assets if it is more likely than not the Company would not be able to realize their benefits, or that future deductibility is uncertain. Tax benefits are recognized only if it is more likely than not that the tax benefits will be utilized in the foreseeable future.

Stock-Based Compensation

Share-Based Compensation

The costs of all employee stock options, as well as other equity-based compensation arrangements, are reflected in the unaudited condensed consolidated financial statements based on the estimated fair value of the awards on the grant date. That cost is recognized over the period during which an employee is required to provide service in exchange for the award, or in the case of performance options, expense is recognized upon completion of a milestone as defined in the grant agreement. Share-based compensation for stock grants to non-employees is determined as the fair value of the consideration received or the fair value of equity instruments issued, whichever is more reliably measured.

Foreign Operations

Foreign Operations

The accompanying unaudited condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021 include assets amounting to approximately $227 thousand and $274 thousand, respectively, relating to operations of ClearSign Asia Limited. The Beijing registered capital requirement is $350 thousand, which is required to be paid by 2027, and of which none has been paid to date. It is always possible that unanticipated events in foreign countries could disrupt the Company’s operations, and since the first quarter of 2020 this has been and currently continues to be the case with the effects of the recent COVID-19 pandemic.

Foreign Currency

Foreign Currency

Assets and liabilities of ClearSign Asia Limited with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using rates that approximate those in effect during the period. The resulting translation adjustments are included in the Company’s condensed consolidated balance sheets in the stockholders’ equity section as a component of accumulated other comprehensive gain (loss).

Noncontrolling Interest

Noncontrolling Interest

The subsidiary of the Company has a minority shareholder agreement representing an ownership interest of 1.00% of ClearSign Asia Limited. The Company accounts for this noncontrolling interest pursuant to FASB ASC 810 whereby gains and losses in a subsidiary with a noncontrolling interest are allocated to the noncontrolling interest based on the ownership percentage of the noncontrolling interest, even if that allocation results in a deficit noncontrolling interest balance.

Net Loss per Common Share

Net Loss per Common Share

Basic loss per share is computed by dividing loss available to common stockholders by the weighted-average number of common shares outstanding. Diluted loss per share is computed similar to basic loss per share except that the denominator is increased to include additional common shares available upon exercise of stock options and warrants using the treasury stock method, except for periods for which no common share equivalents are included because their effect would be anti-dilutive. At March 31, 2022 and December 31, 2021, potentially dilutive shares outstanding amounted to 3.3 million and 3.1 million, respectively.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

In June 2017, the FASB issued an Accounting Standards Update (ASU) 2016-13, Financial Instruments (Topic 326) Measurement of Credit Losses on Financial Instruments, which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. The standard replaces the existing incurred loss impairment model with an expected loss methodology, which will result in more timely recognition of credit losses. ASU 2016-13, and related amendments, are effective for fiscal years beginning after December 15, 2022. The Company has not completed its assessment of the standard but does not expect the adoption to have a material impact on its financial statements.

In November 2021, the FASB issued ASU 2021-10, Government Assistance (Topic 832): Disclosures by Business Entities about Government Assistance, which outlines disclosure requirements for entities that receive assistance from a government body. ASU 2021-10, and related amendments, are affective for annual reports beginning after December 15, 2021. The Company does not expect the adoption to have a material impact on its financial statements.

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Fixed Assets (Tables)

3 Months Ended

Mar. 31, 2022

Fixed Assets

Summary of Fixed Assets

	March 31,		December 31,
(in thousands)	2022		2021
Machinery and equipment	$	666	$	722
Office furniture and equipment		224		218
Leasehold improvements		192		192
		1,082		1,132
Accumulated depreciation and amortization		(1,006)		(1,055)
		76		77
Operating lease ROU assets, net		417		453
Total	$	493	$	530

Schedule Of Supplemental Information

		March 31,		December 31,
(in thousands)		2022		2021
Operating lease ROU assets, net	$	417	$	453
Lease Liabilities:
Current lease liabilities	$	212	$	205
Long term lease liabilities		294		350
Total lease liabilities	$	506	$	555

		For the Three Months Ended
		March 31,
		2022			2021
Operating lease costs	$	57		$	51
Supplemental cash flow information related to leases is as follows:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	57		$	53
Non-cash impact of new leases and lease modifications
New operating lease liabilities	$	—		$	320
Weighted average remaining lease term (in years):		2.6
Weighted average discount rate:		5.8	%

Schedule of minimum future payments

Minimum future payments under the Company’s lease liabilities at March 31, 2022 are as follows:

	Discounted		Payments
	lease		due under
(in thousands)	liability		lease
	payments		agreements
2022 (remaining 9 months)	$	158	$	176
2023		122		136
2024		54		64
2025		59		66
2026		63		67
Thereafter		50		51
Total	$	506	$	560

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Patents and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2022

Patents and Other Intangible Assets

Schedule of Patents and other intangible assets

Patents and other intangible assets are summarized as follows:

	March 31,		December 31,
(in thousands)	2022		2021
Patents
Patents pending	$	473	$	439
Issued patents		577		577
		1,050		1,016
Trademarks
Trademarks pending		1		3
Registered trademarks		95		94
		96		97
Other		8		8
		1,154		1,121
Accumulated amortization		(352)		(322)
	$	802	$	799

Schedule of future amortization expense

Future amortization expense associated with issued patents and registered trademarks as of March 31, 2022 is as follows:

(in thousands)
2022 (remaining 9 months)	$	88
2023		96
2024		74
2025		42
2026		9
Thereafter		11
	$	320

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Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity Incentive Plan [Member]

Schedule of share-based compensation activity

Ending balances of the Plans are as follows:

	March 31,	December 31,
(in thousands)	2022	2021
Outstanding options and restricted stock units	3,307	3,076
Reserved but unissued shares under the Plans	2,758	2,901
Total authorized shares under the Plans	6,065	5,977

Stock options

Schedule of weighted-average assumptions used in calculation of fair value of stock options

The following weighted-average assumptions were utilized in the calculation of the fair value of stock options:

	March 31,
	2022
Expected life	5.71 years
Weighted average volatility	77.64	%
Weighted average risk-free interest rate	1.39	%
Expected dividend rate	0	%

Schedule of stock option activity

A summary of the Company’s stock option activity and changes is as follows:

	March 31,
	2022
				Weighted
				Average
	Options to	Weighted		Remaining
	Purchase	Average		Contractual
	Common	Exercise		Life (in
(in thousands)	Stock	Price		years)
Outstanding at January 1	2,964	$	2.06	6.89
Granted	88	$	1.26	9.76
Exercised	(3)	$	0.89	—
Forfeited/Expired	(10)	$	2.93	—
Outstanding at March 31	3,039	$	2.03	6.76
Exercisable at March 31	2,202	$	1.71	6.05

Consultant Stock Plan

Schedule of share-based compensation activity

	For the Three Months Ended
	March 31,
	2022		2021
Compensation Expense	$	7	$	9
Weighted Average Value Per Share	$	1.93	$	2.33

Schedule of stock option activity

	March 31,
(in thousands)	2022
Reserved but unissued shares January 1		211
Grants		(4)
Reserved but unissued shares		207

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Organization and Description of Business (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Organization and Description of Business [Line Items]
Accumulated deficit	$ (84,255)	$ (82,765)
At The Market Facility (ATM)
Organization and Description of Business [Line Items]
Number of shares of common stock issued	1.6
Share price of common stock issued	$ 3.85
Deferred Offering Costs	$ 227
Proceeds from issuance of common stock, net of offering costs	6,100
Net cash proceeds from the offering	$ 5,900

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Summary of Significant Accounting Policies - Contract Acquisition Costs and Practical Expedients (Details)	3 Months Ended
	Mar. 31, 2022
Summary of Significant Accounting Policies
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true false]	true

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Summary of Significant Accounting Policies - Fixed Assets and Leases (Details) - Fixed Assets Other Than Leasehold Improvements	3 Months Ended
	Mar. 31, 2022
Minimum [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, depreciable life	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, depreciable life	4 years

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Summary of Significant Accounting Policies - Foreign Operations (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Assets	$ 8,644	$ 9,363
CHINA
Property, Plant and Equipment [Line Items]
Assets	227	$ 274
Registered capital requirement	$ 350

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Summary of Significant Accounting Policies - Noncontrolling interest (Details)	Mar. 31, 2022
Minority Shareholder (Member)
Variable Interest Entity [Line Items]
Minority shareholder ownership interest percentage	1.00%

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Summary of Significant Accounting Policies - Net Loss per Common Share (Details) - shares shares in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Summary of Significant Accounting Policies
Potentially dilutive shares outstanding (in shares)	3.3	3.1

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Fixed Assets - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 1,082	$ 1,132
Accumulated depreciation and amortization	(1,006)	(1,055)
Fixed assets, net, after accumulated amortization	76	77
Operating lease ROU assets, net	417	453
Total	493	530
Machinery and equipment
Property, Plant and Equipment [Line Items]
Machinery and equipment	666	722
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Office furniture and equipment	224	218
Leasehold improvements
Property, Plant and Equipment [Line Items]
Leasehold improvements	$ 192	$ 192

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Fixed Assets - Supplemental balance sheet and cash flow information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Operating Lease
Operating lease ROU assets, net	$ 417		$ 453
Lease Liabilities:
Current lease liabilities	212		205
Long term lease liabilities	294		350
Total lease liabilities	506		$ 555
Operating lease cost	57	$ 51
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 57	53
New operating lease liabilities		$ 320
Weighted average remaining lease term (in years)	2 years 7 months 6 days
Weighted average discount rate	5.80%

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Fixed Assets - Minimum future payments (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Fixed Assets
2022 (remaining 9 months)	$ 176
2023	136
2024	64
2025	66
2026	67
Thereafter	51
Total	560
2022 (remaining 9 months)	158
2023	122
2024	54
2025	59
2026	63
Thereafter	50
Total	$ 506

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Fixed Assets - Additional information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases
Depreciation expense	$ 7	$ 8
Interest on future minimum payments	56
Seattle and Tulsa
Leases
Estimated restoration cost		$ 32
Monthly rent expense	24
CHINA
Leases
Monthly rent expense	$ 5
Minimum [Member] | Seattle and Tulsa
Leases
Remaining term (in years)	1 year
Annual rent expense, increase (in percent)	2.00%
Agreement expiration term (in years)	12 months
Maximum [Member] | Seattle and Tulsa
Leases
Remaining term (in years)	6 years
Annual rent expense, increase (in percent)	3.00%
Agreement expiration term (in years)	6 years

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Patents and Other Intangible Assets - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Patents	$ 1,050	$ 1,016
Trademarks	96	97
Other	8	8
Patents and other intangible assets	1,154	1,121
Accumulated amortization	(352)	(322)
Finite-Lived Intangible Assets, Net	802	799
Patents Pending
Patents	473	439
Issued Patents
Patents	577	577
Trademarks Pending
Trademarks	1	3
Registered Trademarks
Trademarks	$ 95	$ 94

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Patents and Other Intangible Assets - Future amortization expense (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Patents and Other Intangible Assets
2022 (remaining 9 months)	$ 88
2023	96
2024	74
2025	42
2026	9
Thereafter	11
Finite-Lived Intangible Assets, Net	$ 320

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Patents and Other Intangible Assets - Additional information (Details)	3 Months Ended
	Mar. 31, 2022
Minimum [Member]
Intangible assets
Amortization life (in years)	3 years
Maximum [Member]
Intangible assets
Amortization life (in years)	5 years
Trademarks
Intangible assets
Amortization life (in years)	10 years

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Revenue, Contract Assets and Contract Liabilities (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) project	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)
Revenues	$ 0	$ 363
Reversal of accruals for product warranties that expired	$ 51
Number of projects to expire product warranties | project	3
Contract assets	$ 244			$ 39
Contract liabilities	84			$ 84
Residual cost on completed contract			$ 8
Burner Contract
Cost of goods sold	0	$ 250
Loss Contract [Member]
Cost of goods sold	$ 18

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Equity - Common Stock and Preferred Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
	Jul. 31, 2018	Mar. 31, 2022	Mar. 31, 2021
Stockholders' equity
Common stock, authorized shares		62,500
Preferred stock, authorized shares		2,000
Net proceeds from the offering		$ 578	$ 3,393
ATM
Stockholders' equity
Number of shares of common stock issued		496
Aggregate offering price		$ 15,000
Net proceeds from the offering		$ 614
Share price of shares issued in offering (in dollars per share)		$ 1.24
Participation Right
Stockholders' equity
Stock Issued, Investor, Maximum Voting Power Percentage	20.00%
Stock Issued, Investor, Maximum Beneficial Ownership Percentage	20.00%
Common Stock | ATM
Stockholders' equity
Number of shares of common stock issued		1,600
Gross proceeds from the offering		$ 6,100
Net proceeds from the offering		$ 5,900
Share price of shares issued in offering (in dollars per share)		$ 3.85

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Equity - Equity Incentive Plan (Details) - shares		3 Months Ended	12 Months Ended
	Jun. 17, 2021	Mar. 31, 2022	Dec. 31, 2021
Equity Incentive Plan [Member]
Share-based compensation
Outstanding options and restricted stock units		3,307,000	3,076,000
Reserved but unissued shares under the Plans		2,758,000	2,901,000
Total authorized shares under the Plans		6,065,000	5,977,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		150,423
2021 Plan
Share-based compensation
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Increase Shares Available for Issuance	400,000

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Equity - Stock Options - Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Equity
Outstanding shares, beginning balance	2,964
Granted (in shares)	88
Exercised (in shares)	(3)
Forfeited/Expired (in shares)	(10)
Outstanding shares, ending balance	3,039		2,964
Exercisable (in shares)	2,202
Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 2.06
Granted - Weighted Average Exercise Price (in dollars per share)	1.26
Exercised - Weighted Average Exercise Price (in dollars per share)	0.89
Forfeited/Expired - Weighted Average Exercise Price (in dollars per share)	2.93
Outstanding - Weighted Average Exercise Price (in dollars per share)	2.03		$ 2.06
Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 1.71
Granted - Weighted Average Remaining Contractual Life (in years)	9 years 9 months 3 days
Exercised - Weighted Average Remaining Contractual Life (in years)	0 years
Forfeited/Expired - Weighted Average Remaining Contractual Life (in years)	0 years
Stock options, Contractual life (in years)	6 years 9 months 3 days		6 years 10 months 20 days
Exercisable - Weighted Average Remaining Contractual Life (in years)	6 years 18 days
Estimated aggregate pretax intrinsic value	$ 848
Total unrecognized compensation	1,800
Compensation expense	$ 42	$ 410

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Equity - Stock Options - Valuation assumptions (Details)	3 Months Ended
	Mar. 31, 2022
Equity
Expected life	5 years 8 months 15 days
Weighted average volatility	77.64%
Weighted average risk-free interest rate	1.39%
Expected dividend rate	0.00%

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Equity - Restricted Stock Units (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 42	$ 410
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for services (in shares)	59
Vesting period	12 months
Restricted Stock Units | 2021 Director Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Value of Compensation	$ 85
Unrecognized compensation	$ 85
Restricted Stock Units | 2021 Employee Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for services (in shares)	97
Unrecognized compensation	$ 105
Compensation expense	$ 35

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Equity - Stock Grants (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) employee $ / shares shares	Dec. 31, 2021 USD ($)
Share-based compensation
Exercise price (in dollars per share) | $ / shares	$ 1.26
2021 Employee Awards
Share-based compensation
Stock options issued in lieu of bonus in cash | shares	66
Exercise price (in dollars per share) | $ / shares	$ 1.44
Number of shares issued for one time bonus | shares	3
Amount of one time bonus to one employee | $	$ 3
Number of employees | employee	1
Accrued bonuses | $		$ 125

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Equity - Consultant Stock Plan (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 42	$ 410
Consultant Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved but unissued shares under the Consultant Plan at January 1	211
Stock grants	(4)
Reserved but unissued shares under the Consultant Plan at Period End	207
Compensation expense	$ 7	$ 9
Weighted Average Value Per Share	$ 1.93	$ 2.33
Maximum increase in available number of authorized shares as a percentage of new shares issued	1.00%

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Equity - Inducement Stock Options (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	88
Compensation expense	$ 42	$ 410
Inducement Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of the non-qualified stock options	176
Compensation expense	$ 0	$ 13
Inducement Stock Options | Non-Qualified Stock Option | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			341

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The Paycheck Protection Program (PPP) Loan (Details) - PPP Loan - USD ($) $ in Thousands		3 Months Ended
	May 08, 2020	Jun. 30, 2021
Proceeds from loan	$ 251
Loan term (in years)	2 years
Interest rate (as a percent)	1.00%
Gain on forgiveness of Payroll Protection Program Loan and interest		$ 251