10-Q/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

Amendment No. 1

(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, 2020
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: 001-36812

SALARIUS PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)

Delaware	46-5087339
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

2450 Holcombe Blvd., Suite J 608, Houston, TX 77021

(Address of principal executive offices)(Zip Code)

(346) 772-0346

Registrant's telephone number, including area code

(Former name, former address and former fiscal year, If changed since last report)

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, $ 0.0001 par value	SLRX	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 the 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 that 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 5, 2020, there were 13,650,752 shares of common stock outstanding.

EXPLANATORY NOTE

Salarius Pharmaceuticals, Inc. is filing this Amendment No. 1 on Form 10-Q/A to its Quarterly Report on Form 10-Q for quarter ended March 31, 2020, as filed with the Securities and Exchange Commission on May 14, 2020, solely for the purpose of providing XBRL as Exhibit 101 in accordance with Rule 405 of Regulation S-T. Other than as described above, no changes are made to the Quarterly Report on Form 10-Q as filed on May 14, 2020

SALARIUS PHARMACEUTICALS, INC.

TABLE OF CONTENTS

		Page
PART I.	Financial Information
Item 1.	Financial Statements (Unaudited)	5
	Condensed Consolidated Balance Sheets	5
	Condensed Consolidated Statements of Operations	6
	Condensed Consolidated Statements of Cash Flows	7
	Condensed Consolidated Statements of Stockholders' Equity (Deficit)	8
	Notes to Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	24
Item 4.	Controls and Procedures	24
PART II.	Other Information
Item 1.	Legal Proceedings	25
Item 1A.	Risk Factors	25
Item 5.	Other Information	28
Item 6.	Exhibits	30
SIGNATURES		31

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

The information in this Quarterly Report on Form 10-Q, including the information incorporated herein by reference, include forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act"), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These are statements that include, but are not limited to, statements about future periods; the Company's strategy and ongoing development programs; the Company's clinical trials, including status, costs, goals, timing and other expectations related thereto; the Company’s belief as to the potential of its lead compound, SP-2577; the Company's strategic collaborations and license agreements, intellectual property, FDA approval process and government regulation; the potential for Seclidemstat to target the epigenetic dysregulation underlying Ewing sarcoma and advanced solid tumors including, but not limited to, prostate, breast, ovarian, melanoma, colorectal and other cancers; expected timing and results of clinical studies; the nature, strategy and focus of the Company; the development and commercial potential of any product candidates; the Company's ability to regain and maintain compliance with Nasdaq's continued listing standards; the Company’s expectations as to revenue, cash flow, and expenses; critical accounting policies; the potential impact of the COVID-19 pandemic on the Company’s business, operations, cash flow and ability to obtain additional financing; the sufficiency of the Company's cash on hand for future operating and capital requirements; the Company's liquidity position, future capital requirements, and need for, and ability to secure, additional financing; the ability of the Company to access additional financing under the Grant Contract with Cancer Prevention and Research Institute of Texas; and the Company's operating losses and ability to continue as a going concern. These forward-looking statements are based on current expectations and beliefs and involve numerous risks and uncertainties, including those discussed under “Part I — Item 1A — Risk Factors,” in our Annual Report on Form 10-K for the year ended December 31, 2019, and under Part II — Item 1A — Risk Factors in this Quarterly Report on Form 10-Q. These risks and uncertainties that could cause actual results to differ materially from expectations or those expressed in these forward-looking statements. These forward-looking statements should not be relied upon as predictions of future events as we cannot assure you that the events or circumstances reflected in these statements will be achieved or will occur. When used in this report, the words “believe,” “may,” “could,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “indicate,” “seek,” “should,” “would,” “aim,” “target” and similar expressions are intended to identify forward-looking statements, though not all forward-looking statements contain these identifying words. All statements, other than statements of historical fact, are statements that could be deemed forward-looking statements.

If any of these risks or uncertainties materializes or any of these assumptions proves incorrect, our results could differ materially from the forward-looking statements in this report. All forward-looking statements in this report are current only as of the date of this report. We do not undertake any obligation to publicly update any forward-looking statement to reflect events or circumstances after the date on which any statement is made or to reflect the occurrence of unanticipated events.

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

SALARIUS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	March 31, 2020		December 31, 2019
Assets
Current assets:
Cash and cash equivalents	$	9,646,940	$	3,738,900
Grants receivable from CPRIT	591,129		—
Prepaid expenses and other current assets	646,360		955,899
Total current assets	10,884,429		4,694,799
Property and equipment, net	21,889		25,016
Goodwill	8,865,909		8,865,909
Other assets	293,147		308,674
Total assets	$	20,065,374	$	13,894,398
Liabilities and stockholders' equity (deficit)
Current liabilities:
Accounts payable	$	979,823	$	1,790,966
Accrued expenses and other current liabilities	795,567		160,783
Note payable	252,679		502,332
Deferred revenue	—		541,701
Warrant liability	34,692		317,762
Total liabilities	2,062,761		3,313,544
Commitments and contingencies (Note 6)
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; 468,694 issued and outstanding	47		—
Common stock, $0.0001 par value; 100,000,000 shares authorized; 13,650,838 and 4,519,533 shares issued at March 31, 2020 and December 31, 2019, and 13,645,677 and 4,511,174 shares outstanding at March 31, 2020 and December 31, 2019, respectively	1,364		451
Additional paid-in capital	32,161,718		22,657,103
Accumulated deficit	(14,160,516)		(12,076,700)
Total stockholders' equity	18,002,613		10,580,854
Total liabilities and stockholders' equity	$	20,065,374	$	13,894,398

See accompanying notes to condensed consolidated financial statements.

5

SALARIUS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Revenue:
Grant revenue	$	1,132,830	$	655,635
Operating expenses:
Research and development	1,643,371		699,929
General and administrative	1,859,017		1,488,490
Total operating expenses	3,502,388		2,188,419
Loss before other income (expense)	(2,369,558)		(1,532,784)
Change in fair value of warrant liability	283,070		—
Interest income net	2,672		10,708
Net loss	$	(2,083,816)	$	(1,522,076)
Loss per common share — basic and diluted	$	(0.22)	$	(0.64)
Weighted-average number of common shares outstanding — basic and diluted	9,534,842		2,372,940

See accompanying notes to condensed consolidated financial statements.

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SALARIUS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Operating activities
Net loss	$	(2,083,816)	$	(1,522,076)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and impairment	4,233		114,707
Equity-based compensation expense	38,409		35,407
Change in fair value of warrant liability	(283,070)		—
Changes in operating assets and liabilities:
Grants receivable	(591,129)		—
Prepaid expenses and other current assets	298,959		30,743
Accounts payable	(911,301)		589,700
Accrued expenses and other current liabilities	361,382		(462,816)
Due to/from related party	—		1,256
Deferred revenue	(541,701)		(655,634)
Net cash used in operating activities	(3,708,034)		(1,868,713)
Financing activities
Proceeds from issuance of equity securities, net	9,865,727		1,508,179
Payments on note payable	(249,653)		—
Net cash provided by financing activities	9,616,074		1,508,179
Net increase (decrease) in cash, cash equivalents and restricted cash	5,908,040		(360,534)
Cash, cash equivalents and restricted cash at beginning of period	3,738,900		6,131,781
Cash, cash equivalents and restricted cash at end of period	$	9,646,940	$	5,771,247
Supplemental disclosure of cash flow information:
Cash paid for interest	$	3,061	$	—
Non-cash investing and financing activities:
Accrued issuance costs for public offering	$	398,561	$	—
Issuance of shares for license	$	—	$	110,474
Conversion of liabilities to equity	$	—	$	2,869,412

See accompanying notes to condensed consolidated financial statements.

7

SALARIUS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)

(Unaudited)

	Common Stock			Preferred Stock		Additional Paid-In Capital		Accumulated Deficit		Total Stockholders' Equity (Deficit)
	Shares	Amount		Shares	Amount
Balance at December 31, 2018	2,032,763	$	203	—	—	$	3,869,120	$	(5,140,437)	$	(1,271,114)
Issuance of equity securities	960,489	96		—	—	4,377,495		—		4,377,591
Issuance of equity securities for license	12,907	1		—	—	110,473		—		110,474
Equity-based compensation expense	9,550	1		—	—	35,406		—		35,407
Net loss	—	—		—	—	—		(1,522,076)		(1,522,076)
Balance at March 31, 2019	3,015,709	301		—	—	8,392,494		(6,662,513)		1,730,282
Balance at December 31, 2019	4,511,174	451		—	—	22,657,103		(12,076,700)		10,580,854
Issuance of equity securities, net	8,353,480	835		1,246,519	125	9,466,206		—		9,467,166
Preferred shares converted to common shares	777,825	78		(777,825)	(78)	—		—		—
Equity-based compensation expense	3,198	—		—	—	38,409		—		38,409
Net loss	—	—		—	—	—		(2,083,816)		(2,083,816)
Balance at March 31, 2020	13,645,677	$	1,364	468,694	47	$	32,161,718	$	(14,160,516)	$	18,002,613

See accompanying notes to condensed consolidated financial statements.

8

SALARIUS PHARMACEUTICALS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE 1. ORGANIZATION AND OPERATIONS

Nature of Business

Salarius Pharmaceuticals, Inc. (“Salarius” or the “Company”), together with its subsidiaries, Salarius Pharmaceuticals, LLC, Flex Innovation Group LLC, and TK Pharma, Inc., is a clinical-stage biotechnology company focused on developing effective treatments for cancers with high unmet medical need caused by dysregulated gene expression. Epigenetics refers to the regulatory system that affects gene expression and the Company's lead epigenetic enzyme technology was licensed from the University of Utah Research Foundation in 2011. The Company is located in Houston, Texas.

Merger with Flex Pharma, Inc.

On January 3, 2019, Flex Pharma, Inc. ("Flex Pharma"), Salarius Pharmaceuticals LLC ("Private Salarius") and Falcon Acquisition Sub, LLC (“Merger Sub”), a wholly owned subsidiary of Flex Pharma, entered into an Agreement and Plan of Merger (the “Merger Agreement”). Pursuant to the Merger Agreement, Merger Sub merged with and into Private Salarius, with Private Salarius continuing as a wholly owned subsidiary of Flex Pharma. The merger was completed on July 19, 2019. After the merger, Flex Pharma was renamed Salarius Pharmaceuticals, Inc. The merger was accounted for as a reverse acquisition with Private Salarius being deemed the acquiring company for accounting purposes. See Note 3.

Risks Related to Covid-19 Pandemic

The outbreak of COVID-19 has spread worldwide. On March 11, 2020, the World Health Organization declared the outbreak a pandemic. The COVID-19 pandemic is affecting the United States and global economies and may affect the Company’s operations and those of third parties on which the Company relies. While the potential economic impact brought by, and the duration of, the COVID-19 pandemic is difficult to assess or predict, the impact of the COVID-19 pandemic on the global financial markets may reduce the Company’s ability to access capital, which could negatively impact the Company’s long-term liquidity. The ultimate impact of the COVID-19 pandemic is highly uncertain and subject to change. The Company does not yet know the full extent of potential delays or impacts on its business, financing or other activities or on healthcare systems or the global economy as a whole. However, these effects could have a material impact on the Company’s liquidity, capital resources, operations and business and those of the third parties on which we rely.

NOTE 2. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States ("GAAP"). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standard Codification ("ASC") and Accounting Standards Update ("ASU") of the Financial Accounting Standards Board ("FASB").

As described above, the merger with Flex Pharma closed on July 19, 2019. The merger was accounted for as a reverse acquisition with Private Salarius being deemed the acquiring company for accounting purposes. Private Salarius’ historical financial statements have replaced Flex Pharma’s historical consolidated financial statements with respect to periods prior to the completion of the merger with retroactive adjustments to Private Salarius' legal capital to reflect the legal capital of Flex Pharma. Flex Pharma (renamed Salarius Pharmaceuticals, Inc.) remains the continuing registrant and reporting company. Accordingly, the historical financial and operating data of Salarius Pharmaceuticals, Inc., which covers periods prior to the closing date of the merger, reflects the assets, liabilities and results of operations of Private Salarius and does not reflect the assets, liabilities and results of operations of Flex Pharma for the periods prior to July 19, 2019. The Company has retrospectively adjusted its Statement of Changes in Stockholders’ Equity (Deficit) and the weighted average shares used in determining loss per common share to reflect the conversion of the outstanding common unit, profits interest common unit and Series A Preferred unit of

9

Private Salarius that converted into shares of the Company’s common stock upon the merger, and to reflect the effect of the 25 to 1 reverse stock split of the Company’s common stock which occurred upon the merger.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Unaudited Interim Financial Information

The accompanying interim financial statements are unaudited. These unaudited interim financial statements have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements. These unaudited interim financial statements should be read in conjunction with the audited financial statements and accompanying notes for the year ended December 31, 2019 included elsewhere in the Company's Annual Report on Form 10-K filed with the SEC on March 23, 2020. In the opinion of management, the unaudited interim financial statements reflect all the adjustments (consisting of normal recurring adjustments) necessary to state fairly the Company’s financial position as of March 31, 2020 and the results of operations for the three months ended March 31, 2020 and 2019. The interim results of operations are not necessarily indicative of the results that may occur for the full fiscal year. The December 31, 2019 balance sheet included herein was derived from the audited financial statements, but does not include all disclosures, including notes, required by GAAP for complete financial statements.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America as defined by the FASB ASC requires management to make estimates and assumptions that affect certain reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

Cash and Cash Equivalents

Salarius considers all highly-liquid investments with original maturities of three months or less to be cash equivalents.

At March 31, 2020 and December 31, 2019, Salarius also held approximately $0 and $1.0 million, respectively, which represents funds received from Cancer Prevention and Research Institution of Texas ("CPRIT"). These funds were used for costs for allowable expenses, primarily research and development expenses. The grant has a mandatory fund matching requirement. Subject to CPRIT review, the Company believes that all matching fund requirements have been met at March 31, 2020.

Impairment of Long-Lived Assets

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying value may not be recoverable. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. During the three months ended March 31, 2020 and March 31, 2019 , impairment charges related to long-lived assets were $0 and $110,474, respectively.

Goodwill

Goodwill is not amortized but is tested at least annually for impairment at the reporting unit level. The Company has determined that the reporting unit is the single operating segment disclosed in its current financial statements.

Impairment is the condition that exists when the carrying amount of goodwill exceeds its implied fair value. The first step in the impairment process is to determine the fair value of the reporting unit and then compare it to the carrying value, including goodwill. If the fair value exceeds the carrying value, no further action is required and no impairment loss is recognized. Additional impairment assessments may be performed on an interim basis if the Company encounters events or changes in circumstances that would indicate that, more likely than not, the carrying

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value of goodwill has been impaired. There was no impairment of goodwill during the three months ended March 31, 2020 or March 31, 2019, respectively.

Financial Instruments and Credit Risks

Financial instruments that potentially subject the Company to credit risk include cash and cash equivalents and restricted cash. Cash is deposited in demand accounts in federally insured domestic institutions to minimize risk. Insurance is provided through the Federal Deposit Insurance Corporation (“FDIC”). Although the balances in these accounts exceed the federally insured limit from time to time, the Company has not incurred losses related to these deposits.

Warrants

In conjunction with the reverse merger transaction, the Company issued rights to receive warrants to purchase the Company’s common stock. Further, on February 11, 2020, the Company issued warrants to purchase the Company's common stock in a registered public offering. The Company determines whether the warrants should be classified as a liability or equity. For warrants classified as liabilities, the Company estimates the fair value of the warrants at each reporting period using Level 3 inputs with changes in fair value recorded in the Condensed Consolidated Statement of Operations within Change in fair value of warrant liability. The estimates in valuation models are based, in part, on subjective assumptions, including but not limited to stock price volatility, the expected life of the warrants, the risk-free interest rate and the fair value of the common stock underlying the warrants, and could differ materially in the future. The Company will continue to adjust the fair value of the warrant liability at the end of each reporting period for changes in fair value from the prior period until the earlier of the exercise or expiration of the applicable warrant.

Clinical Trial Accruals

The Company’s preclinical and clinical trials are performed by third party contract research organizations (CROs) and/or clinical investigators, and clinical supplies are manufactured by contract manufacturing organizations (CMOs). Invoicing from these third parties may be monthly based upon services performed or based upon milestones achieved. The Company accrues these expenses based upon its assessment of the status of each clinical trial and the work completed, and upon information obtained from the CROs and CMOs. The Company’s estimates are dependent upon the timeliness and accuracy of data provided by the CROs and CMOs regarding the status and cost of the studies, and may not match the actual services performed by the organizations. This could result in adjustments to the Company’s research and development expenses in future periods. To date the Company has had no significant adjustments.

Grants Receivable and Revenue Recognition

Salarius’ source of revenue has been from a grant received from CPRIT. Grant revenue is recognized when qualifying costs are incurred and there is reasonable assurance that conditions of the grant have been met. Cash received from grants in advance of incurring qualifying costs is recorded as deferred revenue and recognized as revenue when qualifying costs are incurred. When grant funds are received after costs have been incurred, the Company records revenue and a corresponding grants receivable.

Research and Development Costs

Research and development costs consist of expenses incurred in performing research and development activities, including pre-clinical studies and clinical trials. Research and development costs include salaries and personnel-related costs, consulting fees, fees paid for contract research services, the costs of laboratory equipment and facilities, license fees and other external costs. Research and development costs are expensed when incurred.

Equity-Based Compensation

Salarius measures equity-based compensation based on the grant date fair value of the awards and recognizes the associated expense in the financial statements over the requisite service period of the award, which is generally the vesting period.

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The Company uses the Black-Scholes option valuation model and the Backsolve method (which is similar to the Black-Scholes valuation model and produces similar results) to estimate the fair value of the stock-based compensation and incentive units. Assumptions utilized in these models including expected volatility calculated based on implied volatility from traded stocks of peer companies, dividend yield and risk-free interest rate. Additionally, forfeitures are accounted for in compensation cost as they occur.

Loss Per Share

Basic net loss per share is calculated by dividing the net loss applicable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Since the Company was in a loss position for all periods presented, diluted net loss per share is the same as basic net loss per share for all periods, as the inclusion of all potential common shares outstanding is anti-dilutive.

The number of anti-dilutive shares, consisting of common shares underlying (i) common stock options, (ii) stock purchase warrants, (iii) unvested restricted stock, (iv) convertible preferred stock and (v) rights entitling holders to receive warrants to purchase the Company's common shares, which have been excluded from the computation of diluted loss per share, was 10,597,729 and 30,395 shares as of March 31, 2020 and 2019, respectively.

Income Taxes

Income taxes are recorded in accordance with FASB ASC Topic 740, Income Taxes ("ASC 740"), which provides for deferred taxes using an asset and liability approach. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial reporting and the tax reporting basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company provides a valuation allowance against net deferred tax assets unless, based upon the available evidence, it is more likely than not that the deferred tax assets will be realized. The Company has evaluated available evidence and concluded that the Company may not realize the benefit of its deferred tax assets; therefore, a valuation allowance has been established for the full amount of the deferred tax assets.

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740. When uncertain tax positions exist, the Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances. As of March 31, 2020 and December 31, 2019, the Company did not have any significant uncertain tax positions and no interest or penalties have been charged. The Company's practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company is subject to routine audits by taxing jurisdictions.

Subsequent Events

The Company’s management reviewed all material events through the date that the financial statements were issued for subsequent event disclosure consideration.

Application of New Accounting Standards

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other,” which is intended to simplify the subsequent measurement of goodwill. The pronouncement allows an entity, during its annual or interim goodwill impairment evaluation, to compare the fair value of a reporting unit with its carrying amount. An impairment charge is immediately recognized by which the carrying amount exceeds the fair value. This ASU is effective for fiscal

years, and interim periods within those years, beginning after December 15, 2019. The Company does not expect adoption of this ASU to have a material impact on its consolidated financial statements.

Pronouncements Not Yet Adopted

In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes (Topic 740). The guidance eliminates certain exceptions for recognizing deferred taxes for investments, performing intra-period

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allocation and calculating income taxes in interim periods. This guidance also includes guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. ASU 2019-12 is effective for annual and interim periods in fiscal years beginning after December 15, 2020. Early adoption is permitted. The Company is currently evaluating the impact this change will have on its consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement of all expected credit losses for financial assets including trade receivables held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Subsequent to the issuance of ASU 2016-13, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. This ASU does not change the core principle of the guidance in ASU 2016-13, instead these amendments are intended to clarify and improve operability of certain topics included within the credit losses guidance. The FASB also subsequently issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Derivatives and Hedging (Topic 815), and Financial Instruments (Topic 842), which did not change the core principle of the guidance in ASU 2016-13 but clarified that expected recoveries of amounts previously written off and expected to be written off should be included in the valuation account and should not exceed amounts previously written off and expected to be written off. The guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019 for public business entities, excluding smaller reporting companies. Early adoption is permitted. As a smaller reporting company, the guidance will be effective for the Company during the first quarter of 2023. The Company is in the process of assessing the impact adoption will have on its consolidated financial statements.

NOTE 3. REVERSE ACQUISITION AND DISPOSAL

Reverse Acquisition

On January 3, 2019, Flex Pharma, Private Salarius and Merger Sub entered into the Merger Agreement. Pursuant to the Merger Agreement, Merger Sub merged with and into Private Salarius, with Private Salarius continuing as a wholly owned subsidiary of Flex Pharma, with Flex Pharma deemed the legal acquiror and Private Salarius deemed the accounting acquiror, as described below. The merger was completed on July 19, 2019. After the merger, Flex Pharma was renamed Salarius Pharmaceuticals, Inc. The merger was accounted for as a reverse acquisition business acquisition with Private Salarius being deemed the acquiring company for accounting purposes. Private Salarius, as the accounting acquirer, recorded the assets acquired and liabilities assumed of Flex Pharma in the merger at their fair values as of the acquisition date. Private Salarius’ historical financial statements have replaced Flex Pharma’s historical consolidated financial statements with respect to periods prior to the completion of the merger with retroactive adjustments to Private Salarius' legal capital to reflect the legal capital of Flex Pharma. Flex Pharma (which was renamed Salarius Pharmaceuticals, Inc. in connection with the merger) remains the continuing registrant and reporting company.

Private Salarius was determined to be the accounting acquirer based on the following facts and circumstances: (1) members of Private Salarius owned approximately 80.7% of the voting interests of the combined company immediately following the closing of the transaction; (2) the majority of the board of directors of the combined company was composed of directors designated by Private Salarius under the terms of the Merger Agreement; and (3) existing members of Private Salarius management became the management of the combined company.

The business purposes of the merger included, among other purposes, obtaining the following potential advantages: (i) the combined organization’s resources would be immediately available to support Private Salarius’ research on Seclidemstat; and (ii) the public company status would allow the Company greater potential access to additional capital.

At the closing of the merger, each outstanding common unit, profits interest common unit and Series A Preferred unit of Private Salarius converted into shares of the Company’s common stock (subject to the payment of cash in lieu of fractional shares and after giving effect to a 25 to 1 reverse stock split of the Company’s common stock) at the conversion ratio formulae described in the Merger Agreement.

In addition, at the closing of the merger, the Company distributed one right per share of common stock to stockholders of record as of the close of business on July 18, 2019. Each right entitles such stockholders to receive

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a warrant to purchase shares of the Company’s common stock six months and one day following the closing date of the merger. See Note 8.

The Company accounted for the acquisition as a reverse merger using purchase accounting. Because the merger qualifies as a reverse acquisition and given that Private Salarius was a private company at the time of the merger and therefore its value was not readily determinable, the fair value of the merger consideration was deemed to be equal to the sum of the quoted market capitalization of the Company at the merger date, the fair value of the Flex Pharma options that fully vested upon the merger together, and the fair value of the rights to receive warrants that were granted to the pre-merger Flex Pharma stockholders. Total purchase consideration is as follows:

Flex Pharma market capitalization at closing	$	10,963,526
Fair value of rights to warrants	1,629,095
Fair value of Flex Pharma outstanding options on the merger date	132,227
Total purchase consideration	$	12,724,848

The Company recorded all tangible and intangible assets acquired and liabilities assumed at their preliminary estimated fair values on the merger date. The following represents the allocation of the estimated purchase consideration:

Fair value of assets acquired
Cash	$	5,405,826
Accounts receivable	15,168
Inventory	122,235
Prepaid expense and other current assets	106,319
Goodwill and intangibles	8,937,899
Total fair value of assets acquired	14,587,447
Fair value of liabilities assumed
Accounts payable, accrued liabilities and other current liabilities	1,862,599
Total fair value of liabilities assumed	1,862,599
Net assets acquired	$	12,724,848

Unaudited Pro Forma Disclosure

The following unaudited pro forma financial information summarizes the results of operations for the three months ended March 31, 2020 and 2019 as if the merger described above had been completed as of January 1, 2019. Pro forma information primarily reflects adjustments relating to the reversal of transaction costs. Assuming that the merger had been completed as of January 1, 2019, the transaction costs would have been expensed in the prior period.

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Revenues	$	1,132,830	$	655,635
Net loss	(2,083,816)		(9,415,074)
Net loss per share	(0.22)		(3.97)

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NOTE 4. GRANTS RECEIVABLE

Grants receivable represents qualifying costs incurred and there is reasonable assurance that conditions of the grant have been met but the corresponding funds have not been received as of the reporting date. Grants receivable balances are $591,129 and $0 as of March 31, 2020 and December 31, 2019, respectively.

NOTE 5. PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other current assets at March 31, 2020 and December 31, 2019 consisted of the following:

	March 31, 2020		December 31, 2019
Prepaid clinical trial expenses	$	140,964	$	202,743
Prepaid insurance	360,608		617,096
Other prepaid and current assets	144,788		136,060
Total prepaid expenses and other current assets	$	646,360	$	955,899

Prepaid insurance is comprised of prepaid directors' and officers' insurance. In July 2019, the Company financed their directors' and officers' insurance premium with a short term note, the principal amount of which is approximately $0.9 million bearing interest at a rate of 4.61%. The note payable balances were $252,679 and $502,332, which were included within Current Liabilities on the Condensed Consolidated Balance Sheets at March 31, 2020 and December 31, 2019, respectively.

NOTE 6. COMMITMENTS AND CONTINGENCIES

License Agreement with the University of Utah Research Foundation

In 2011, the Company entered into a license agreement with the University of Utah, under which, the Company acquired an exclusive license to and epigenetic enzyme lysine specific demethylase 1 ("LSD 1"). In exchange for the license, the Company issued 2% equity ownership in the Company based on a fully diluted basis at the effective date of the agreement and subject to certain adjustments specified in the agreement, granted revenue sharing rights on any resulting products or processes to commence on first commercial sale, and milestone payments based upon regulatory approval of any resulting product or process as well as on the second anniversary of first commercial sale.

Cancer Prevention and Research Institute of Texas

In June 2016, the Company entered into a Cancer Research Grant Contract with CPRIT. Pursuant to the contract, CPRIT awarded the Company a grant of up to $18.7 million to fund the development of LSD-1 inhibitor. This is a 3-year grant award which originally expired on May 31, 2019. However, a six-month extension was approved by CPRIT in May 2019 and an additional six-month extension through May 2020. The Company has applied for an extension with a proposed contract end date of November 30, 2020.

The Company will retain ownership over any intellectual property developed under the contract ("Project Result"). With respect to non-commercial use of any Project Result, the Company agreed to grant to CPRIT a nonexclusive, irrevocable, royalty-free, perpetual, worldwide license with right to sublicense any necessary additional intellectual property rights to exploit all Project Results by CPRIT, other governmental entities and agencies of the State of Texas, and private or independent institutions of higher education located in Texas, for education, research and other non-commercial purposes.

The Company is obligated to make revenue-sharing payments to CPRIT with respect to net sales of any product covered by the contract, up to a maximum repayment of certain percentage of the aggregate amount paid to the Company by CPRIT under the CPRIT contract. The payments are determined as a percentage of net sales, which may be reduced if the Company is required to obtain a license from a third party to sell any such product. In addition, upon meeting the foregoing limitation on revenue-sharing payments, the Company agreed to make continued revenue-sharing payments to CPRIT of less than 1% of net sales.

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The CPRIT grant is subject to funding conditions including a matching funds requirement where the Company will match 50% of funding from the CPRIT grant. As of March 31, 2020, the Company has received an aggregate of $9.6 million from the CPRIT grant and there was $9.1 million of funds available for the Company to draw upon meeting certain requirements. There was no funding received from CPRIT during the three months ended March 31, 2020. At March 31, 2020 and December 31, 2019, the Company had deferred revenue of $0 and $541,701, respectively, related to the CPRIT contract. At March 31, 2020 and December 31, 2019, the Company had grants receivable of $591,129 and $0, respectively, related to the CPRIT contract.

NOTE 7. FAIR VALUE OF FINANCIAL INSTRUMENTS

Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. A fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last is considered unobservable, are used to measure fair value:

Level 1 - Unadjusted 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; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Significant unobservable inputs including Salarius’ own assumptions in determining fair value.

The Company believes the recorded values of its financial instruments, including cash and cash equivalents, accounts payable and note payable approximate their fair values due to the short-term nature of these instruments.

The following table sets forth a summary of changes in the fair value of Level 3 liabilities, the warrant associated with the Flex Pharma merger measured at fair value on a recurring basis for the three months ended March 31, 2020:

Description	Balance at December 31, 2019		Change in Fair Value		Balance at March 31, 2020
Warrant liability	$	317,762	$	283,070	$	34,692

NOTE 8. STOCKHOLDERS' EQUITY

The accompanying condensed consolidated statements of stockholders' equity (deficit) and the footnotes to the interim financial statements have been retroactively adjusted to reflect the equity structure (that is, the number and type of equity interests issued) of Flex Pharma, the legal parent (accounting acquiree) of the merger closed on July 19, 2019, with the retained earnings and other equity balances of the Private Salarius before the merger. Private Salarius' equity was restated using the exchange ratio established in the merger agreement to reflect the number of shares of Flex Pharma issued in the merger. Concurrent with the merger, the Company's shareholders approved a 1-for-25 reverse stock split, which became effective on July 19, 2019. Total shares owned by Flex Pharma pre-merger shareholders (net of fraction shares paid in cash) was 8,353,480 shares after reverse stock-split.

Common Stock and Preferred Stock

On February 11, 2020, the Company completed a public offering with total gross proceeds of approximately $11.0 million, which includes the full exercise of the underwriter's over-allotment option to purchase an additional 1,252,173 shares and warrants prior to deducting underwriting discounts and commissions and offering expenses payable by Salarius. The offering is comprised of 7,101,307 Class A units, priced at a public offering price of $1.15 per unit, with each unit consisting of one share of common stock and a five-year warrant to purchase one share of

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common stock at an exercise price of $1.15 per share, and 1,246,519 Class B units, priced at a public offering price of $1.15 per unit, with each unit consisting of one share of Series A convertible preferred stock and a five-year warrant to purchase one share of common stock with and exercise price of $1.15 per share. A total of 8,343,480 shares of common stock, 1,246,519 shares of Series A convertible preferred stock, and warrants to purchase up to 9,599,999 shares of common stock were issued in the offering, including the full exercise of the over-allotment option. The convertible preferred stock issued in this transaction includes a beneficial ownership limitation on conversion, but has no dividend rights (except to the extent that dividends are also paid on the common stock). The conversion price of the Series A convertible preferred stock in the offering as well as the exercise price of the warrants are fixed and do not contain any variable pricing features or any price based anti-dilutive features.

In February 2020, 777,825 shares of Series A convertible preferred stock were converted to common stock.

During the three months ended March 31, 2019 the Company issued 960,489 common shares (4,035 Series A preferred units and 350 profit interest units of Private Salarius) for $4,377,591 (net of offering cost of $10,617).

In December 2018, the Company agreed to issue an unrelated party 12,907 common shares (91 common units of Private Salarius) to acquire licenses for the DNMT1 inhibitor. The issuance was approved in January 2019 and the license was granted in 2018. .

Right to Warrants

Pursuant to the Merger Agreement (See Note 3), Flex Pharma distributed one right per share of common stock to stockholders of record as of the close of business on July 18, 2019. Each right entitles such stockholders to receive a warrant to purchase the Company's common shares on January 20, 2020. These warrants are exercisable, in the aggregate, into 142,711 shares of the Company's common stock with a 5-year term from January 20, 2020, and an exercise price of $15.17 per share. The warrants are subject to a cashless exercise, at the option of the Company, at the closing of an issuance and sale of the Company’s common stock in certain qualified financing, upon the closing of which the holders of warrants shall be entitled to receive a number of shares of common stock equal to the greater of two formulae defined by the Merger Agreement, which are based on the volume weighted average price of the Company's common stock during the 10 consecutive trading days ending on the trading day immediately preceding the date of exercise. As a result, the warrants have been classified as a liability.

The Company accounted for these warrants at fair value using Level 3 inputs. The Company determined the fair value of this warrant liability using a Black-Scholes valuation model as the Company believes the value will closely approximate the value from the binomial asset pricing model that consisted of a conditional probability weighted expected return method that values the Company’s equity securities assuming various possible future outcomes to estimate the allocation of value within one or more of the scenarios. Using this method, unobservable inputs included the Company’s equity value, expected timing of possible outcomes, risk free interest rates and stock

price volatility.

Variables used in the Black-Scholes model are as follows:

	March 31, 2020	December 31, 2019
Discount rate	0.37%	1.69%
Expected life (years)	4.81 years	5.06 years
Expected volatility	113.17%	103.07%
Expected dividend	—%	—%

Wedbush Warrant

On July 19, 2019, upon the closing of the merger, the Company elected to issue warrants to purchase 42,928 common shares to Wedbush Securities Inc. ("Wedbush") to satisfy $500,000 of the $1,000,000 success fee payable to Wedbush at the closing of the merger. The remaining $500,000 success fee was paid in cash. These warrants have an exercise price of $18.90 and a 5-year term. As of March 31, 2020, all warrants issued to Wedbush were outstanding.

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NOTE 9. EQUITY-BASED COMPENSATION

Equity Incentive Plans

The Company has granted options to employees, directors, and consultants under the 2015 Equity Incentive Plan (the "2015 Plan"). On July 19, 2019, the Company completed a merger with Flex Pharma and Flex Pharma had fully vested options to purchase 90,279 common shares outstanding as of the date of the merger that continue to be exercisable. The 2015 Plan provides for the grant of incentive stock options ("ISOs"), nonstatutory stock options, restricted stock awards, restricted stock units, stock appreciation rights, performance-based stock awards and other stock-based awards. Additionally, the 2015 Plan provides for the grant of performance-based cash awards. ISOs may be granted only to the Company's employees. All other awards may be granted to the Company's employees, including officers, and to non-employee directors and consultants. As of March 31, 2020, there were 34,087 shares remaining available for the grant of stock awards under the 2015 Plan.

On March 23, 2020, the Company awarded 182,000 stock options to its employees and directors, pursuant to the plan described above. Stock options generally vest over one to four years and have a contractual term of ten years. Stock options are valued using the Black-Scholes option pricing model and compensation cost is recognized based on the resulting value over the service period. Expected volatilities utilized in the model are based on implied volatilities from traded stocks of peer companies. Similarly, the dividend yield is based on historical experience and the estimate of future dividend yields. The risk-free interest rate is derived from the U.S. Treasury yield curve in effect at the time of grant. The expected term of the options is based on the average period the stock options are expected to remain outstanding. The fair value of the option grants of $92,007 has been estimated with the following assumptions for the three months ended March 31, 2020:

Risk-free interest rate	0.48	%
Volatility	113.17	%
Expected life (years)	5.80
Expected dividend yield	0	%

The following table summarizes stock option activity for employees and non-employees for the three months ended March 31, 2020:

	Shares	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2019	166,233	$	34.42	6.53	$	—
Granted	182,000	0.61
Forfeited	(10,000)	—
Outstanding at March 31, 2020	338,233	$	17.01	8.18	$	—
Exercisable at March 31, 2020	84,711	$	59.85	3.23	$	—

As of March 31, 2020, there was approximately $489,641 of total unrecognized compensation cost related to unvested stock options. Total unrecognized compensation cost will be adjusted for future changes in employee and non-employee forfeitures, if any. The Company expects to recognize that cost over a remaining weighted-average period of 3.27 years.

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NOTE 10. SUBSEQUENT EVENTS

On April 9, 2020, the Company was notified (the “Notice”) by Nasdaq Stock Market, LLC (“Nasdaq”) that on April 8, 2020 the average closing price of the Company’s common stock (the “Common Stock”) over the prior 30 consecutive trading days had fallen below $1.00 per share, which is the minimum average closing price required to maintain listing on Nasdaq under Nasdaq Listing Rule 5450(a)(1) (the “Minimum Bid Requirement”). The Notice has no immediate effect on the listing or trading of the Company’s common stock. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has 180 calendar days, to regain compliance with the Minimum Bid Requirement. To regain compliance, the closing bid price of the Company’s common stock must be at least $1.00 per share for a minimum of ten consecutive business days during this 180-day period.

On April 20, 2020, the Company was notified by Nasdaq that it has determined to toll the compliance periods for bid price and market value of publicly held shares (“MVPHS”) requirements (collectively, the “Price-based Requirements”) through June 30, 2020. In that regard, on April 16, 2020, Nasdaq filed an immediately effective rule change with the Securities and Exchange Commission. As a result, companies presently in compliance periods for any Price-based Requirements will remain at that same stage of the process and will not be subject to being delisted for these concerns. Starting on July 1, 2020, companies will receive the balance of any pending compliance period in effect at the start of the tolling period to regain compliance.

Accordingly, since the Company had 173 calendar days remaining in its bid price compliance period as of April 16, 2020, it will, upon reinstatement of the Price-based Requirements, still has 173 calendar days from July 1, 2020, or until December 21, 2020, subject to any extensions granted by Nasdaq, to regain compliance. The Company can regain compliance, either during the suspension or during the compliance period resuming after the suspension by evidencing compliance with the Price-based Requirements for a minimum of 10 consecutive trading days.

On April 13, 2020, the Company was granted a loan of approximately $180,000 from Paycheck Protection Program established under the CARES Act. The loan matures on April 13, 2022 and bears interest at a rate of 0.5% per annum. The loan will be forgiven if the Company use it to pay payroll costs including benefit, mortgage interest, rent, and utilities payment over the 8 weeks after getting the loan, by submitting a request to the lender that is servicing the loan.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis should be read in conjunction with the unaudited financial information and the notes thereto included herein, as well as our audited financial statements and notes thereto contained in our Annual Report on Form 10-K for the year ended December 31, 2019, filed with the SEC on March 23, 2020. This discussion contains forward-looking statements that involve risks and uncertainties. Our actual results and the timing of selected events could differ materially from those anticipated in these forward-looking statements as a result of several factors, including those set forth under "Part I - Item 1A - Risk Factors" discussed in our Annual Report on Form 10-K for the year ended December 31, 2019, for the year ended December 31, 2019, filed with the SEC on March 23, 2020, in other subsequent filings with the SEC, and elsewhere in this Quarterly Report on Form 10-Q. These statements, like all statements in this report, speak only as of the date of this Quarterly Report on Form 10-Q (unless another date is indicated), and we undertake no obligation to update or revise these statements in light of future developments.

Overview

We are a clinical-stage biotechnology company focused on developing effective treatments for cancer with high, unmet medical need caused by dysregulated gene expression. Epigenetics refers to the regulatory system that affects gene expression and our lead epigenetic enzyme technology was licensed from the University of Utah Research Foundation in 2011.

We are focused on strategies addressing dysregulated gene expression, epigenetic strategies for cancer treatment. Epigenetics refers to the system that regulates gene expression through conformational changes to the chromatin rather than changes to the DNA sequence itself. Our compound, Seclidemstat (“SP-2577”), is a small molecule that inhibits the epigenetic enzyme lysine specific demethylase 1 (“LSD1”). LSD1 is an enzyme that removes mono- and di-methyl marks on histones (core protein of chromatin) to alter gene expression. LSD1’s enzymatic activity can cause genes to turn on or off and thereby affect the cell’s gene expression and overall activity. In addition, LSD1 can act via its scaffolding properties, independently of its enzymatic function, to alter gene expression and modulate cell fate. In healthy cells, LSD1 is necessary for stem cell maintenance and cell development processes. However, in several cancers LSD1 is highly expressed and acts aberrantly to incorrectly silence or activate genes leading to disease progression. High levels of LSD1 expression are often associated with aggressive cancer phenotypes and poor patient prognosis. Hence, development of targeted LSD1 inhibitors is of interest for the treatment of various cancers. SP-2577 uses a novel, reversible mechanism to effectively inhibit LSD1’s enzymatic and scaffolding properties and thereby treat and prevent cancer progression.

Our first indication of interest for SP-2577 is a devastating bone and soft-tissue cancer called Ewing sarcoma. Ewing sarcoma mostly afflicts adolescents and young adults, with the median age of diagnosis being 15. The most commonly expressed fusion oncoprotein in Ewing sarcoma is the EWS-FLI fusion protein, which is present in approximately 85% of Ewing sarcoma cases. The LSD1 enzyme associates with EWS-FLI (and other E26 Transformation-Specific (“ETS”) fusion proteins) and is thought to promote tumorigenesis. We believe the SP-2577 molecule helps inhibit EWS-FLI activity by disrupting EWS-FLI from associating with coregulators (including LSD1) that are necessary for its cancer promoting activity. Therefore, we believe that SP-2577 can potentially reverse the aberrant gene expression and thereby possibly prevent Ewing sarcoma cell proliferation and even promote cell death. Preclinical studies of SP-2577 in certain Ewing sarcoma animal models show a significant tumor reduction as well as a significant survival benefit compared to untreated animals. Our ongoing Phase 1/2 clinical trial is designed as a single agent dose escalation followed by a dose expansion study. The trial can enroll up to 50 relapsed or refractory Ewing sarcoma patients. The primary objectives of the study are to assess the safety and tolerability of SP-2577. Secondary objectives include assessing preliminary efficacy of SP-2577.

As LSD1 can associate with over 60 regulatory proteins other than EWS-FLI, we believe that LSD1 may also play a critical role in progression of various other cancer types. These include both solid tumors and hematologic malignancies. In the second quarter of 2019, we initiated a second company-sponsored Phase 1 trial to study SP-2577 in Advanced Solid Tumors. The Advanced Solid Tumor (“AST”) trial is a single agent dose escalation, dose expansion study enrolling patients with advanced malignancies, excluding Ewing sarcoma or central nervous system tumors.

In addition, recent data from “LSD1 Ablation Stimulates Anti-tumor Immunity and Enables Checkpoint Blockade” by W. Sheng, et al. and “Inhibition of Histone Lysine-specific Demethylase 1 Elicits Breast Tumor Immunity and Enhances Antitumor Efficacy of Immune Checkpoint Blockade” by Y. Qin, et al. suggests that LSD1 plays a role in tumor immune activity and can sensitize tumors to checkpoint inhibitors. These recent works have sparked interest

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in combining LSD1 inhibitors with checkpoint inhibitors. We are conducting preclinical work with SP-2577 in this area.

We have no products approved for commercial sale and have not generated any revenue from product sales. We have never been profitable and have incurred operating losses in each year since inception. We had an accumulated deficit of $14,160,516 as of March 31, 2020. Substantially all of our operating losses resulted from expenses incurred in connection with our research and development programs and from general and administrative costs associated with our operations.

The lack of revenue from product sales to date and recurring losses from operations since our inception raise substantial doubt about our ability to continue as a going concern. Our financial statements are prepared using Generally Accepted Accounting Principles in the United States of America (“GAAP”) applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Our financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts and classification of liabilities should we be unable to continue as a going concern.

We expect to continue to incur significant expenses and increasing operating losses for at least the next several years as we initiate and continue the clinical development of, and seek regulatory approval for, our product candidates, add personnel necessary to continue to operate as a public company upon closing of the merger, and work to develop an advanced clinical pipeline of product candidates. We expect that our operating losses will fluctuate significantly from quarter-to-quarter and year-to-year due to timing of clinical development programs and efforts to achieve regulatory approval.

As of March 31, 2020, we had cash and cash equivalents of $9,646,940, which includes $0 for funds received from Cancer Prevention and Research Institution of Texas ("CPRIT"). As of March 31, 2020, CPRIT fund matching requirements had been fully met. As of March 31, 2020, we have received an aggregate of $9.6 million from the CPRIT grant and there was $9.1 million of funds available for us to draw upon meeting certain requirements. The Company has applied for an extension with a proposed contract end date of November 30, 2020.

We believe that our $9.6 million in cash and cash equivalents currently on hand are sufficient to fund our anticipated operating and capital requirements through at least 12 months from the date this quarterly report on Form 10-Q is filed, however we will continue to require substantial additional capital to continue our clinical development activities. Accordingly, we will need to raise substantial additional capital to continue to fund our operations as a whole. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our development, regulatory and commercialization efforts. Failure to raise capital as and when needed, on favorable terms or at all, would have a negative impact on our financial condition and our ability to develop and commercialize our product candidates and to fund our operations.

We intend, when required, to obtain additional capital through the sale of equity securities in one or more offerings or through issuances of debt instruments. We may also consider new collaborations or selectively partnering our technology. However, we cannot provide any assurance that we will be successful in accomplishing any of our plans to obtain additional capital or be able to do so on favorable terms or on terms acceptable to us.

Special Note About Coronavirus (COVID-19)

The COVID-19 pandemic is significantly affecting the United States, global economies, and businesses worldwide. While the potential magnitude and duration of the economic and social impact of the COVID-19 pandemic is difficult to assess or predict, the impact on the global financial markets may, in the future, reduce our ability to access capital, which could negatively impact our short-term and long-term liquidity. The COVID-19 pandemic could also have a material and negative impact on our liquidity, capital resources (including our ability to secure additional financing if and when needed), our business and operations, and our workforce, as well as those of the third parties with which we do business or upon which we rely. While, the situation is fluid and we do not yet know the full extent of potential delays or impacts on us or on healthcare systems or the global economy in general, Salarius has worked to adapt to the unexpected and challenging circumstances resulting from the COVID-19 pandemic and at this time we are experiencing minimal COVID-19 disruptions to our clinical programs, our manufacturing capabilities, or our financing capabilities. However, we may experience disruptions in the future that have and could further adversely impact our business operations as well as our preclinical studies and clinical trials.

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Although at this time we are experiencing minimal disruption to our clinical trials, our ongoing Phase 1/2 clinical trial can enroll up to 50 relapsed or refractory Ewing sarcoma patients and in the future we may encounter delays in enrolling

Although at this time we are experiencing minimal disruption to our clinical trials, our ongoing Phase 1/2 clinical trial can enroll up to 50 relapsed or refractory Ewing sarcoma patients and in the future we may encounter delays in enrolling new patients due to concerns or healthcare resource constraints as a result of the COVID-19 pandemic. In addition, although at this time we have experienced no disruptions to manufacturing capabilities, certain aspects of our supply chain may be disrupted as certain of our third party suppliers and manufacturers have paused their operations in response to the COVID-19 pandemic or have otherwise encountered delays in providing supplies and services. We continue to evaluate the extent to which these delays will impact our ability to manufacture our product candidates for our clinical trials and conduct other research and development operations and maintain applicable timelines. The ultimate impact of the COVID-19 pandemic on our business operations as well as our preclinical studies and clinical trials remains uncertain and subject to change and will depend on future developments, which cannot be accurately predicted. We will continue to monitor the situation closely.

Results of Operations

Three Months Ended March 31, 2020 Compared to the Three Months Ended March 31, 2019

The following table sets forth the condensed consolidated results of our operations for the three months ended March 31, 2020 compared to the three months ended March 31, 2019.

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019		Change
					$		%
Grant revenue	$	1,132,830	$	655,635	$	477,195	73	%
Research and development expenses	(1,643,371)		(699,929)		(943,442)		135	%
General and administrative expenses	(1,859,017)		(1,488,490)		(370,527)		25	%
Change in fair value of warrant liability	283,070		—		283,070		—	%
Interest income, net	2,672		10,708		(8,036)		(75)	%
Net loss	$	(2,083,816)	$	(1,522,076)	$	(561,740)	37	%

Grant Revenue

Grant revenue, which was derived solely from the CPRIT grant, was $1,132,830 during the three months ended March 31, 2020 compared to $655,635 during the three months ended March 31, 2019. The increase in revenue from the CPRIT grant was due to an increase in overall expenses which resulted in an increase in the amount of expenses reimbursable under the grant. Given the nature of the development process, grant revenue will fluctuate depending on the stage of development and the timing of expenses.

Research and Development Expenses

Research and development expenses were $1,643,371 during the three months ended March 31, 2020 compared to $699,929 during the three months ended March 31, 2019. The increase of $943,442 was principally due to the production of tablets for use in clinical trials, increased consulting fee related to clinic trials and a pre-clinical study for our next generation Seclidemstat program, and increased clinical trial costs resulting from the increased number of patients enrolled and additional clinical trial sites.

General and Administrative Expenses

General and administrative expenses were $1,859,017 for the three months ended March 31, 2020 compared to $1,488,490 for the three months ended March 31, 2019. The net increase of $370,527 resulted from the costs related to the Company' transformation into a public company during July 2019 more than offsetting reduced spending for professional fees and legal costs compared to the same period in the prior year. During the current period the transformation accounted for higher director and officer insurance expense, and fees related to its NASDAQ listing and investor relations costs. Additionally, compensation expense increased compared to the three months ended March 31, 2019 resulting from the payment of bonuses and increased personnel, These higher costs

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were partially offset by decreased legal and professional services expenses resulting from 2019 costs incurred for the announced reverse merger with Flex Pharma that did not recur in the current period.

Change in Fair Value of Warrant Liability

The change in fair value of warrant liability of $283,070 was primarily due to the fluctuation of the price of our common stock ($3.78 per share on December 31, 2019 compared to $0.68 per share on March 31, 2020). The Company recognized a gain of $283,070 due the change in fair value of warrant liability.

Liquidity and Capital Resources

Overview

Since inception, we have incurred operating losses and we anticipate that we will continue to incur losses for the foreseeable future. To date, we have generated revenue solely from CPRIT grant, and have not generated any revenue from product sales.

We do not know when, or if, we will generate any revenue from product sales. We do not expect to generate any revenue from product sales unless and until we obtain regulatory approval for and commercializes any of our product candidates. At the same time, we expect our expenses to increase in connection with our ongoing development and manufacturing activities, particularly as we continue the research, development, manufacture and clinical trials of, and seek regulatory approval for our product candidates.

As of March 31, 2020, we had $8,821,668 of working capital and our cash and cash equivalents totaled $9,646,940, which were held in bank deposit accounts and money market funds. Our cash and cash equivalents balance increased during the three months ended March 31, 2020, primarily due to our public offering closed on February 11, 2020.

Cash Flows

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Net cash used in:
Operating activities	$	(3,708,034)	$	(1,868,713)
Financing activities	9,616,074		1,508,179
Net increase (decrease) in cash and cash equivalents	$	5,908,040	$	(360,534)

Operating Activities

Net cash used in operating activities was $3,708,034 and $1,868,713 for the three months ended March 31, 2020, and March 31, 2019, respectively, an increase of $1,839,321. This cash spending increase was primarily due to increased clinical trial and related research costs plus the Company's increased spending for the transformation into a public company during 2020.

Financing Activities

Net cash provided by financing activities was $9,616,074 for the first quarter of the year 2020, compared to $1,508,179 for the same period of the year 2019. The increase of cash provided by financing activities resulted from the Company completing a public offering on February 11, 2020 with net proceeds of approximately $9.8 million, partially offset by the payment of $249,653 towards the principal on an insurance financing note by the Company. There were no such payments during the three months ended March 31, 2019.

Critical Accounting Policies and Significant Judgments and Estimates

Our management's discussion and analysis of our financial condition and results of operations is based on our condensed consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these condensed consolidated financial statements requires us to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the date of the condensed consolidated balance sheet and the reported amounts of expenses during the reporting period. In

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accordance with GAAP, we base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances at the time such estimates are made. Actual results may differ materially from our estimates and judgments under different assumptions or conditions. We periodically review our estimates in light of changes in circumstances, facts and experience. The effects of material revisions in estimates are reflected in our condensed consolidated financial statements prospectively from the date of the change in estimate.

There have been no material changes to our critical accounting policies from those described in "Management's Discussion and Analysis of Financial Condition and Results of Operations" included in our Annual Report on Form 10-K filed with SEC on March 23, 2020.

Readers should refer to our Annual Report on Form10-K filed with SEC on March 23, 2020, Note 2, Basis of Presentation and Significant Accounting Policies to the accompanying financial statements for descriptions of these policies and estimates.

Application of New Accounting Standards

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other,” which is intended to simplify the subsequent measurement of goodwill. The pronouncement allows an entity, during its annual or interim goodwill impairment evaluation, to compare the fair value of a reporting unit with its carrying amount. An impairment charge is immediately recognized by which the carrying amount exceeds the fair value. This ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. We do not expect adoption of this ASU to have a material impact on our condensed consolidated financial statements.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Not applicable.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain “disclosure controls and procedures,” as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, that are designed to ensure that information required to be disclosed in our periodic and current reports that we file under the Exchange Act with the SEC is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer (our principal executive officer) and our Chief Financial Officer (our principal financial officer and principal accounting officer), as appropriate, to allow timely decisions regarding required disclosure.

In designing and evaluating our disclosure controls and procedures, management recognized that disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are met. Our disclosure controls and procedures have been designed to meet reasonable assurance standards. Additionally, in designing disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures. The design of any disclosure controls and procedures also is 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.

Based on management’s evaluation (with the participation of our principal executive officer and principal financial officer), as of the end of the period covered by this Quarterly Report on Form 10-Q, our Chief Executive Officer (our principal executive officer) and our Chief Financial Officer (our principal financial and accounting officer) have concluded that, as of such date, our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) were effective at the reasonable assurance level.

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Changes in Internal Control over Financial Reporting

During the three months ended March 31, 2020, there was no significant change in our internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II - OTHER INFORMATION

Item 1. Legal Proceedings

We are not a party to any material legal proceedings on the date of this report. We may from time to time become involved in legal proceedings arising in the ordinary course of business, and the resolution of any such claims could be material.

.

Item 1A. Risk Factors

For a discussion of certain factors that could materially affect our business, financial condition, and operating results, you should carefully review and consider the information under “Part I, Item 1A- Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2019, filed with the SEC on March 23, 2020, as well as the risk factors set forth below. The risk factors below are in addition to and supplement (and with respect to certain matters, update) the risk factors discussed in our Annual Report on Form 10-K. Other than as set forth below, there have been no material changes to the risk factors included in our Annual Report on Form 10-K filed with the SEC on March 23, 2020.

Risks Related to Our Business and Our Industry

The COVID-19 pandemic could adversely affect our business, results of operations, and financial condition.

To date, the COVID-19 pandemic has negatively impacted the global economy and the magnitude, severity, and duration of this impact is unclear and difficult to assess. Salarius has worked to adapt to the unexpected and challenging circumstances resulting from the COVID-19 pandemic and we have experienced minimal COVID-19 disruptions to our clinical programs, our manufacturing capabilities and our financing capabilities during the three months ended March 31, 2020. Both our Ewing Sarcoma clinical study and our Advanced Solid Tumor clinical study are active and continue to enroll patients. Salarius plans to release clinical data from both studies, as previously disclosed, during 2020 and 2021. However, the impact of COVID-19 changes daily and is difficult to predict.

To combat the spread of COVID-19, the United States and other locations in which we operate have imposed measures such as quarantines and “shelter-in-place” orders that are restricting business operations and travel and requiring individuals to work from home (“WFH”), which has impacted all aspects of our business as well as those of the third-parties we rely upon for certain supplies and services. The continuation of WFH and other restrictions for an extended period of time may negatively impact our productivity, research and development, operations, preclinical studies and clinical trials, business and financial results. Among other things, the COVID-19 pandemic may result in:

•a global economic recession or depression that could significantly and negatively impact our business or those of third parties upon which we rely for services and supplies;

•constraints on our ability to conduct our operations and our preclinical studies and clinical trials;

•delays in our ability to extend the term of the CPRIT grant;

•reduced productivity in our business operations, research and development, marketing, and other activities;

•disruptions to our third-party manufacturers and suppliers;

•increased costs resulting from WFH or from our efforts to mitigate the impact of COVID-19; and

•reduced access to financing to fund our operations due to a deterioration of credit and financial markets.

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We will continue to monitor the situation but the continued disruption of the COVID-19 pandemic and its effects on the worldwide economy could negatively and materially impact our operating and financial operating results. The resumption of normal business operations may be delayed and a resurgence of COVID-19 could occur resulting in continued disruption to us or third parties with whom we do business. As a result, the effects of the COVID-19 pandemic could have a material adverse impact on our business, results of operations and financial condition for the remainder of 2020 and beyond.

Risks Related to Salarius’ Financial Condition and Capital Requirements

We will continue to require substantial additional capital to fund our clinical activities and operations and the impact of the COVID-19 pandemic on the financial markets will likely negatively impact our ability to raise additional financing.

We are a clinical development-stage biopharmaceutical company with a limited operating history. We have no products approved for commercial sale and have not generated any revenue from product sales. We have never been profitable and have incurred operating losses in each year since inception. Our net losses were $6,936,263 and $2,083,816 for the year ended December 31, 2019 and the three months ended March 31, 2020, respectively. We have prepared our financial statements on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or amounts of liabilities that might be necessary should we be unable to continue in existence.

We will continue to require substantial additional capital to continue our clinical development and potential commercialization activities. Accordingly, we will need to raise substantial additional capital to continue to fund our operations. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our clinical development efforts. To date, we have financed our operations primarily through the sale of equity securities. Our stock price has been negatively impacted in part by the downturn in the financial markets due to the COVID-19 pandemic. This in turn will likely negatively impact our ability to raise funds through equity-related financings. Further, the global economic downturn may impair our ability to obtain additional financing through other means, such as debt financing. There can be no assurance we will be able to secure additional financing on favorable terms to us, or at all. Further any debt financing may contain restrictive covenants which limit our operating flexibility and any equity financing will likely result in additional and possibly significant dilution to existing stockholders. Failure to raise sufficient capital, as and when needed, would have a significant and negative impact on our financial condition and our ability to develop our product candidates.

Risks Related to Salarius’ Reliance on Third Parties

We rely on third parties to conduct our clinical trials, manufacture our product candidates, and perform other services. If these parties are not able to successfully perform due to the impact of the COVID-19 pandemic or otherwise, there may be delays in our ability to successfully complete clinical development, obtain regulatory approval or commercialize our product candidates and our business could be substantially harmed.

We have relied upon and plan to continue to rely upon third-parties such as CROs, hospitals, etc. to conduct, monitor and manage our ongoing clinical programs. We rely on these parties for execution of clinical trials and manage and control only some aspects of their activities. In addition, third parties may not prioritize Salarius’ clinical trials relative to those of other customers due to resource or other constraints as a result of COVID-19. Due to the continued impact of COVID-19 pandemic or otherwise, we may experience enrollment at a slower pace at certain of our clinical trial sites than initially anticipated. Further, our clinical trial sites may be required to suspend enrollment due to travel restrictions, workplace safety concerns, quarantine, facility closures, and other governmental restrictions. As a result, results from our clinical trials may be delayed, which in turn would have a material adverse impact on our clinical trial plans and timelines and impair our ability to successfully complete clinical development, obtain regulatory approval, or commercialize our product candidates. This in turn would substantially harm our business and operations.

Salarius expects to rely on third parties to manufacture its clinical product supplies and to produce and process its product candidates, if approved. Salarius’ commercialization of any of its product candidates could be stopped, delayed or made less profitable if those third parties are unable to provide Salarius with sufficient quantities of drug product, or to do so at acceptable quality levels or prices due to the COVID-19 pandemic or otherwise.

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Salarius currently relies on outside vendors to manufacture its clinical supplies of its product candidates and plans to continue relying on third parties to manufacture its product candidates on a commercial scale, if approved. The COVID-19 pandemic has placed a significant strain on the pharmaceutical industry, manufacturers of clinical supplies, healthcare-related supplies and resources, and the healthcare-related manufacturing sector in general. The impact of the COVID-19 pandemic has exacerbated the risks to which Salarius is subject due to its reliance on third-party manufacturers. For example, Salarius may be unable to identify manufacturers on acceptable terms or at all or third-party manufacturers may not be able to execute Salarius’ manufacturing procedures appropriately or may not perform as agreed or may not remain in the contract manufacturing business for the time required to supply its clinical trials or to successfully produce, store and distribute its products.

Additionally, Salarius’ manufacturers may experience manufacturing difficulties due to resource constraints, the impact of the COVID-19 pandemic, or as a result of labor disputes or unstable political environments. If Salarius’ manufacturers were to encounter any of these difficulties, or otherwise fail to comply with their contractual obligations, Salarius’ ability to provide its product candidates to patients in clinical trials would be jeopardized. Any delay or interruption in the supply of clinical trial supplies could delay the completion of clinical trials, increase the costs associated with maintaining clinical trial programs and, depending upon the period of delay, require Salarius to commence new clinical trials at additional expense or terminate clinical trials completely.

Risks Related to Salarius’ Business Operations

Due to its limited number of employees, Salarius’ operations could be significantly and disproportionately impacted if any of its personnel were to test positive for COVID-19.

Salarius is a small company with a limited number of employees performing multiple tasks each. Salarius is also highly dependent on David J. Arthur, its president and chief executive officer, the loss of whose services may adversely impact the achievement of its objectives. There is currently a shortage of highly qualified personnel in Salarius’ industry, which is likely to continue. Additionally, this shortage of highly qualified personnel is particularly acute in the area where Salarius is located. If any of Salarius’ personnel were to test positive for COVID-19, it would likely significantly impair Salarius’ operations. The loss of services of any of Salarius’ personnel, including Mr. Arthur, particularly for an extended period due to COVID-19 or otherwise, would likely impede the progress of Salarius’ research, development, and commercialization objectives and would negatively impact Salarius’ ability to succeed in its product development strategy.

We may face business disruption and related risks resulting from President Trump's recent invocation of the Defense Production Act, either of which could have a material adverse effect on our business.

In response to the COVID-19 pandemic, President Trump invoked the Defense Production Act, codified at 50 U.S.C. §§ 4501 et seq. (the “Defense Production Act”). Pursuant to the, Defense Production Act the federal government may, among other things, require domestic industries to provide essential goods and services needed for the national defense. While we have not experienced any significant impact on our business as a result of such actions, we continue to assess the potential impact COVID-19 and the invocation of the Defense Production Act may have on our ability to effectively conduct our commercialization efforts and development programs and otherwise conduct our business operations as planned. There can be no assurance that we will not be further impacted by the COVID-19 pandemic or by any action taken by the federal government under the Defense Production Act, including downturns in business sentiment generally or in our industry and business in particular.

Risks Related to Our Common Stock

If we are unable to maintain listing of our securities on the Nasdaq Capital Market or another reputable stock exchange, it may be more difficult for our stockholders to sell their securities.

The Nasdaq Stock Market has experienced significant volatility and declines due to the COVID-19 pandemic. In addition, we have a limited public float and our stock price has experienced a significant decline since the reverse merger. Between January 1, 2020 and April 30, 2020, our closing stock price has fluctuated from a high of $3.82 at January 3, 2020 to a low of $0.57 at March 24, 2020. In addition, Nasdaq requires listing issuers to comply with certain standards in order to remain listed on its exchange.

On April 9, 2020, we were notified by Nasdaq that on April 8, 2020 the average closing price of our common stock over the prior 30 consecutive trading days had fallen below $1.00 per share, which is the minimum average closing

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price required to maintain listing on Nasdaq under Nasdaq Listing Rule 5450(a)(1) (the “Minimum Bid Requirement”). In accordance with Nasdaq Listing Rule 5810(c)(3)(A), we have 180 calendar days, to regain compliance with the Minimum Bid Requirement. To regain compliance, the closing bid price of our common stock must be at least $1.00 per share for a minimum of ten consecutive business days during this 180-day period. During this 180-day period, we would anticipate reviewing our options to regain compliance with the minimum bid requirements, including conducting a reverse stock split. If we do not achieve compliance with the Minimum Bid Requirement during the initial 180 calendar day period, we may be eligible for an additional 180 calendar days compliance period. To qualify, we would be required to meet the continued listing requirement for market value of publicly held shares and all other Nasdaq initial listing standards, with the exception of the bid price requirement, and would need to provide written notice of our intention to cure the deficiency during the second compliance period. However, if it appears to Nasdaq staff that we will not be able to cure the deficiency, or if we do not meet the other listing standards, Nasdaq could provide notice that our common stock will become subject to delisting. In the event we receive notice that our common stock is being delisted, Nasdaq rules permit the us to appeal any delisting determination by the Nasdaq staff. There can be no assurance that we will be able to regain compliance with the Minimum Bid Requirement or maintain compliance with the other listing requirements.

On April 20, 2020, we were notified by Nasdaq that it has determined to toll the compliance periods for bid price and market value of publicly held shares requirements (collectively, the “Price-based Requirements”) through June 30, 2020. In that regard, on April 16, 2020, Nasdaq filed an immediately effective rule change with the SEC. As a result, companies presently in compliance periods for any Price-based Requirements will remain at that same stage of the process and will not be subject to being delisted for these concerns. Starting on July 1, 2020, companies will receive the balance of any pending compliance period in effect at the start of the tolling period to regain compliance.

Accordingly, since we had 173 calendar days remaining in our bid price compliance period as of April 16, 2020, we will, upon reinstatement of the Price-based Requirements, still have 173 calendar days from July 1, 2020, or until December 21, 2020, to regain compliance.

If, for any reason, Nasdaq should delist our securities from trading on its exchange and we are unable to obtain listing on another reputable national securities exchange, a reduction in some or all of the following may occur, each of which could materially adversely affect our stockholders:

•the liquidity of our common stock;

•the market price of our common stock;

•our ability to obtain financing for the continuation of our operations;

•the number of institutional and general investors that will consider investing in our common stock;

•the number of market makers in our common stock;

•the availability of information concerning the trading prices and volume of our common stock; and

•the number of broker-dealers willing to execute trades in shares of our common stock.

To the extent that we are unable to resolve any listing deficiency, there is a risk that our common stock may be delisted from Nasdaq, which would adversely impact liquidity of our common stock and potentially result in even lower bid prices for our common stock.

Item 5. Other Information

As previously disclosed in the Current Report on Form 8-K that the Company filed with the SEC on April 24, 2020, the Company entered into an employment agreement with Mark J. Rosenblum, its Chief Financial Officer and Executive Vice President of Finance (the "Employment Agreement"), with the following terms:

Cash Compensation. Mr. Rosenblum’s annual base salary will equal $265,000 (“Base Salary”) and he will be eligible to receive a target annual bonus of at least 35% of his base salary, to be earned based upon the

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achievement of performance objectives to be determined by the Compensation Committee of the Board of Directors of the Company.

Benefits. Mr. Rosenblum will be eligible to participate in any company-sponsored benefit plans and programs, including medical, dental, life and disability insurance, holidays and other perquisites, at a level appropriate for his position and duties and to the extent that the Company makes such benefits generally available to executives of the Company. The Company may from time to time, in its sole discretion, amend, adjust or discontinue the benefits available to the Company’s executives and employees.

Termination for Cause or as a Result of Death, Disability or Resignation. If Mr. Rosenblum is terminated by the Company for “cause” or if his employment is terminated as a result of his death or “disability” or Mr. Rosenblum’s resignation without “good reason”, the Company shall pay Mr. Rosenblum (i) any unpaid Base Salary accrued up to the date of termination, (ii) accrued but unused vacation, (iii) benefits payable to Mr. Rosenblum pursuant to the terms and conditions of any benefit plan or program in which he participated during the term of his employment and (iv) unreimbursed business expenses.

Termination without Cause or Resignation for Good Reason. If the Company terminates Mr. Rosenblum’s employment other than for “cause,” or in the event Mr. Rosenblum terminates with “good reason,” then Mr. Rosenblum will receive (i) severance pay in an amount equal to nine months of his then current Base Salary which shall be paid in equal installments over such period and (ii) a monthly payment as a reimbursement that in the aggregate is equal to nine months of COBRA benefits at active employee rates.

The information under this Item 5 is being provided to clarify that Mr. Rosenblum's title under the Employment Agreement is Chief Financial Officer and Executive Vice President of Finance.

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Item 6. Exhibits

Exhibit number	Description of Document
3.1	Amended and Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2015).
3.2	Certificate of Amendment of Certificate of Incorporation, filed with Secretary of State of Delaware on July 18, 2019 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on July 22, 2019).
3.3	Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock, dated February 10, 2020 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 12, 2020).
3.4	Amended and Restated Bylaws, effective July 19, 2019 (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on July 22, 2019).
4.1	Common Stock Purchase Warrant dated February 11, 2020 (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on February 12, 2020).
4.2	Form of Common Stock Purchase Warrant (incorporated by reference to Exhibit 4.8 to the Registrant’s Registration Statement on Form S-1/A filed on February 6, 2020).
4.3	Form of Preferred Stock Certificate of Registrant (incorporated by reference to Exhibit 4.9 to the Registrant’s Registration Statement on Form S-1/A filed on February 6, 2020).
10.1+	Separation and Release Agreement between Scott Jordan and the Registrant, dated March 18, 2020 (incorporated by reference to Exhibit 10.7 to the Registrant’s Annual Report on Form 10-K filed with the SEC on March 23, 2020).
10.2+	Consulting Agreement between Bruce McCreedy and the Registrant, dated March 6, 2020(incorporated by reference to Exhibit 10.9 to the Registrant’s Annual Report on Form 10-K filed with the SEC on March 23, 2020).
10.3+	Employment Agreement between Mark J. Rosenblum and Salarius Pharmaceutical, Inc., dated April 24, 2020 (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on April 29, 2020).
31.1	Certification of the Principal Executive Officer pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934.
31.2	Certification of the Principal Financial Officer pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934.
32.1*	Certification of Principal Executive Officer and Principal Financial Officer pursuant to Rule 13a-14(b) or 15d-14(b) of the Exchange Act and 18 U.S.C. Section 1350.
101.0	The following materials from Salarius Pharmaceuticals, Inc.'s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, formatted in XBRL (eXtensible Business Reporting Language):(i) Unaudited Condensed Consolidated Balance Sheets, (ii) Unaudited Condensed Consolidated Statements of Operations (iii) Unaudited Condensed Consolidated Statements of Stockholders' Equity (Deficit), (iv) Unaudited Condensed Consolidated Statements of Cash Flows, and (v) Notes to Condensed Unaudited Consolidated Financial Statements.

+ Management contract or compensatory plans or arrangements.

* The material contained in Exhibit 32.1 is not deemed “filed” with the SEC and is not to be incorporated by reference into any filing of the Company under the Securities Act of 1933 or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation language contained in such filing, except to the extent that the registrant specifically incorporates it by reference.

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SIGNATURES

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

		SALARIUS PHARMACEUTICALS, INC.
		By:	/s/ David J. Arthur
			David J. Arthur President and Chief Executive Officer (Principal Executive Officer)
		By:	/s/ Mark J. Rosenblum
			Mark J. Rosenblum Chief Financial Officer and Executive Vice President of Finance (Principal Financial Officer and Principal Accounting Officer)
Date:	May 15, 2020

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EX-31.1

Exhibit 31.1

Certification Pursuant to Securities Exchange Act Rules 13a-14 and 15d-14 as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, David J. Arthur, President and Chief Executive Officer, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q/A of Salarius Pharmaceuticals, Inc.;

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 and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-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 its 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 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.

	/s/ David J. Arthur
	David J. Arthur
May 15, 2020	President and Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification Pursuant to Securities Exchange Act Rules 13a-14 and 15d-14 as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Mark J. Rosenblum, Executive Vice President and Interim Chief Financial Officer, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q/A of Salarius Pharmaceuticals, Inc.;

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 and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-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 its 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 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.

	/s/ Mark J. Rosenblum
	Mark J. Rosenblum
May 15, 2020	Executive Vice President and Interim Chief Financial Officer (Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32.1

Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q/A of Salarius Pharmaceuticals, Inc. (the "Company") for the fiscal period ended March 31, 2020 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of their knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

	/s/ David J. Arthur
	David J. Arthur
May 15, 2020	President and Chief Executive Officer (Principal Executive Officer)

	/s/ Mark J. Rosenblum
	Mark J. Rosenblum
May 15, 2020	Executive Vice President and Interim Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)

XML

PREPAID EXPENSES AND OTHER CURRENT ASSETS

3 Months Ended

Mar. 31, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

PREPAID EXPENSES AND OTHER CURRENT ASSETS

PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other current assets at March 31, 2020 and December 31, 2019 consisted of the following:

	March 31, 2020		December 31, 2019
Prepaid clinical trial expenses	$	140,964	$	202,743
Prepaid insurance	360,608		617,096
Other prepaid and current assets	144,788		136,060
Total prepaid expenses and other current assets	$	646,360	$	955,899

Prepaid insurance is comprised of prepaid directors' and officers' insurance. In July 2019, the Company financed their directors' and officers' insurance premium with a short term note, the principal amount of which is approximately $0.9 million bearing interest at a rate of 4.61%. The note payable balances were $252,679 and $502,332, which were included within Current Liabilities on the Condensed Consolidated Balance Sheets at March 31, 2020 and December 31, 2019, respectively.

XML

EQUITY-BASED COMPENSATION

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

EQUITY-BASED COMPENSATION

EQUITY-BASED COMPENSATION

Equity Incentive Plans

The Company has granted options to employees, directors, and consultants under the 2015 Equity Incentive Plan (the "2015 Plan"). On July 19, 2019, the Company completed a merger with Flex Pharma and Flex Pharma had fully vested options to purchase 90,279 common shares outstanding as of the date of the merger that continue to be exercisable. The 2015 Plan provides for the grant of incentive stock options ("ISOs"), nonstatutory stock options, restricted stock awards, restricted stock units, stock appreciation rights, performance-based stock awards and other stock-based awards. Additionally, the 2015 Plan provides for the grant of performance-based cash awards. ISOs may be granted only to the Company's employees. All other awards may be granted to the Company's employees, including officers, and to non-employee directors and consultants. As of March 31, 2020, there were 34,087 shares remaining available for the grant of stock awards under the 2015 Plan.

On March 23, 2020, the Company awarded 182,000 stock options to its employees and directors, pursuant to the plan described above. Stock options generally vest over one to four years and have a contractual term of ten years. Stock options are valued using the Black-Scholes option pricing model and compensation cost is recognized based on the resulting value over the service period. Expected volatilities utilized in the model are based on implied volatilities from traded stocks of peer companies. Similarly, the dividend yield is based on historical experience and the estimate of future dividend yields. The risk-free interest rate is derived from the U.S. Treasury yield curve in effect at the time of grant. The expected term of the options is based on the average period the stock options are expected to remain outstanding. The fair value of the option grants of $92,007 has been estimated with the following assumptions for the three months ended March 31, 2020:

Risk-free interest rate	0.48	%
Volatility	113.17	%
Expected life (years)	5.80
Expected dividend yield	0	%

The following table summarizes stock option activity for employees and non-employees for the three months ended March 31, 2020:

	Shares	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2019	166,233	$	34.42	6.53	$	—
Granted	182,000	0.61
Forfeited	(10,000)	—
Outstanding at March 31, 2020	338,233	$	17.01	8.18	$	—
Exercisable at March 31, 2020	84,711	$	59.85	3.23	$	—

As of March 31, 2020, there was approximately $489,641 of total unrecognized compensation cost related to unvested stock options. Total unrecognized compensation cost will be adjusted for future changes in employee and non-employee forfeitures, if any. The Company expects to recognize that cost over a remaining weighted-average period of 3.27 years.

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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)

3 Months Ended

Mar. 31, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets at March 31, 2020 and December 31, 2019 consisted of the following:

	March 31, 2020		December 31, 2019
Prepaid clinical trial expenses	$	140,964	$	202,743
Prepaid insurance	360,608		617,096
Other prepaid and current assets	144,788		136,060
Total prepaid expenses and other current assets	$	646,360	$	955,899

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EQUITY-BASED COMPENSATION - Schedule of Fair Value Assumptions (Details)	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Risk-free interest rate	0.48%
Volatility	113.17%
Expected life (years)	5 years 9 months 18 days
Expected dividend yield	0.00%

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in Fair Value	$ 283,070	$ 0
Level 3 | Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31, 2019	317,762
Change in Fair Value	283,070
Balance at March 31, 2020	$ 34,692

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Grant revenue	$ 1,132,830	$ 655,635
Operating expenses:
Research and development	1,643,371	699,929
General and administrative	1,859,017	1,488,490
Total operating expenses	3,502,388	2,188,419
Loss before other income (expense)	(2,369,558)	(1,532,784)
Change in fair value of warrant liability	283,070	0
Interest income net	2,672	10,708
Net loss	$ (2,083,816)	$ (1,522,076)
Net loss per share (usd per share)	$ (0.22)	$ (0.64)
Weighted-average number of common shares outstanding — basic and diluted	9,534,842	2,372,940

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States ("GAAP"). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standard Codification ("ASC") and Accounting Standards Update ("ASU") of the Financial Accounting Standards Board ("FASB").

As described above, the merger with Flex Pharma closed on July 19, 2019. The merger was accounted for as a reverse acquisition with Private Salarius being deemed the acquiring company for accounting purposes. Private Salarius’ historical financial statements have replaced Flex Pharma’s historical consolidated financial statements with respect to periods prior to the completion of the merger with retroactive adjustments to Private Salarius' legal capital to reflect the legal capital of Flex Pharma. Flex Pharma (renamed Salarius Pharmaceuticals, Inc.) remains the continuing registrant and reporting company. Accordingly, the historical financial and operating data of Salarius Pharmaceuticals, Inc., which covers periods prior to the closing date of the merger, reflects the assets, liabilities and results of operations of Private Salarius and does not reflect the assets, liabilities and results of operations of Flex Pharma for the periods prior to July 19, 2019. The Company has retrospectively adjusted its Statement of Changes in Stockholders’ Equity (Deficit) and the weighted average shares used in determining loss per common share to reflect the conversion of the outstanding common unit, profits interest common unit and Series A Preferred unit of

Private Salarius that converted into shares of the Company’s common stock upon the merger, and to reflect the effect of the 25 to 1 reverse stock split of the Company’s common stock which occurred upon the merger.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Unaudited Interim Financial Information

The accompanying interim financial statements are unaudited. These unaudited interim financial statements have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for interim financial information. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements. These unaudited interim financial statements should be read in conjunction with the audited financial statements and accompanying notes for the year ended December 31, 2019 included elsewhere in the Company's Annual Report on Form 10-K filed with the SEC on March 23, 2020. In the opinion of management, the unaudited interim financial statements reflect all the adjustments (consisting of normal recurring adjustments) necessary to state fairly the Company’s financial position as of March 31, 2020 and the results of operations for the three months ended March 31, 2020 and 2019. The interim results of operations are not necessarily indicative of the results that may occur for the full fiscal year. The December 31, 2019 balance sheet included herein was derived from the audited financial statements, but does not include all disclosures, including notes, required by GAAP for complete financial statements.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America as defined by the FASB ASC requires management to make estimates and assumptions that affect certain reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

Cash and Cash Equivalents

Salarius considers all highly-liquid investments with original maturities of three months or less to be cash equivalents.

At March 31, 2020 and December 31, 2019, Salarius also held approximately $0 and $1.0 million, respectively, which represents funds received from Cancer Prevention and Research Institution of Texas ("CPRIT"). These funds were used for costs for allowable expenses, primarily research and development expenses. The grant has a mandatory fund matching requirement. Subject to CPRIT review, the Company believes that all matching fund requirements have been met at March 31, 2020.

Impairment of Long-Lived Assets

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying value may not be recoverable. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. During the three months ended March 31, 2020 and March 31, 2019 , impairment charges related to long-lived assets were $0 and $110,474, respectively.

Goodwill

Goodwill is not amortized but is tested at least annually for impairment at the reporting unit level. The Company has determined that the reporting unit is the single operating segment disclosed in its current financial statements.

Impairment is the condition that exists when the carrying amount of goodwill exceeds its implied fair value. The first step in the impairment process is to determine the fair value of the reporting unit and then compare it to the carrying value, including goodwill. If the fair value exceeds the carrying value, no further action is required and no impairment loss is recognized. Additional impairment assessments may be performed on an interim basis if the Company encounters events or changes in circumstances that would indicate that, more likely than not, the carrying

value of goodwill has been impaired. There was no impairment of goodwill during the three months ended March 31, 2020 or March 31, 2019, respectively.

Financial Instruments and Credit Risks

Financial instruments that potentially subject the Company to credit risk include cash and cash equivalents and restricted cash. Cash is deposited in demand accounts in federally insured domestic institutions to minimize risk. Insurance is provided through the Federal Deposit Insurance Corporation (“FDIC”). Although the balances in these accounts exceed the federally insured limit from time to time, the Company has not incurred losses related to these deposits.

Warrants

In conjunction with the reverse merger transaction, the Company issued rights to receive warrants to purchase the Company’s common stock. Further, on February 11, 2020, the Company issued warrants to purchase the Company's common stock in a registered public offering. The Company determines whether the warrants should be classified as a liability or equity. For warrants classified as liabilities, the Company estimates the fair value of the warrants at each reporting period using Level 3 inputs with changes in fair value recorded in the Condensed Consolidated Statement of Operations within Change in fair value of warrant liability. The estimates in valuation models are based, in part, on subjective assumptions, including but not limited to stock price volatility, the expected life of the warrants, the risk-free interest rate and the fair value of the common stock underlying the warrants, and could differ materially in the future. The Company will continue to adjust the fair value of the warrant liability at the end of each reporting period for changes in fair value from the prior period until the earlier of the exercise or expiration of the applicable warrant.

Clinical Trial Accruals

The Company’s preclinical and clinical trials are performed by third party contract research organizations (CROs) and/or clinical investigators, and clinical supplies are manufactured by contract manufacturing organizations (CMOs). Invoicing from these third parties may be monthly based upon services performed or based upon milestones achieved. The Company accrues these expenses based upon its assessment of the status of each clinical trial and the work completed, and upon information obtained from the CROs and CMOs. The Company’s estimates are dependent upon the timeliness and accuracy of data provided by the CROs and CMOs regarding the status and cost of the studies, and may not match the actual services performed by the organizations. This could result in adjustments to the Company’s research and development expenses in future periods. To date the Company has had no significant adjustments.

Grants Receivable and Revenue Recognition

Salarius’ source of revenue has been from a grant received from CPRIT. Grant revenue is recognized when qualifying costs are incurred and there is reasonable assurance that conditions of the grant have been met. Cash received from grants in advance of incurring qualifying costs is recorded as deferred revenue and recognized as revenue when qualifying costs are incurred. When grant funds are received after costs have been incurred, the Company records revenue and a corresponding grants receivable.

Research and Development Costs

Research and development costs consist of expenses incurred in performing research and development activities, including pre-clinical studies and clinical trials. Research and development costs include salaries and personnel-related costs, consulting fees, fees paid for contract research services, the costs of laboratory equipment and facilities, license fees and other external costs. Research and development costs are expensed when incurred.

Equity-Based Compensation

Salarius measures equity-based compensation based on the grant date fair value of the awards and recognizes the associated expense in the financial statements over the requisite service period of the award, which is generally the vesting period.

The Company uses the Black-Scholes option valuation model and the Backsolve method (which is similar to the Black-Scholes valuation model and produces similar results) to estimate the fair value of the stock-based compensation and incentive units. Assumptions utilized in these models including expected volatility calculated based on implied volatility from traded stocks of peer companies, dividend yield and risk-free interest rate. Additionally, forfeitures are accounted for in compensation cost as they occur.

Loss Per Share

Basic net loss per share is calculated by dividing the net loss applicable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Since the Company was in a loss position for all periods presented, diluted net loss per share is the same as basic net loss per share for all periods, as the inclusion of all potential common shares outstanding is anti-dilutive.

The number of anti-dilutive shares, consisting of common shares underlying (i) common stock options, (ii) stock purchase warrants, (iii) unvested restricted stock, (iv) convertible preferred stock and (v) rights entitling holders to receive warrants to purchase the Company's common shares, which have been excluded from the computation of diluted loss per share, was 10,597,729 and 30,395 shares as of March 31, 2020 and 2019, respectively.

Income Taxes

Income taxes are recorded in accordance with FASB ASC Topic 740, Income Taxes ("ASC 740"), which provides for deferred taxes using an asset and liability approach. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial reporting and the tax reporting basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company provides a valuation allowance against net deferred tax assets unless, based upon the available evidence, it is more likely than not that the deferred tax assets will be realized. The Company has evaluated available evidence and concluded that the Company may not realize the benefit of its deferred tax assets; therefore, a valuation allowance has been established for the full amount of the deferred tax assets.

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740. When uncertain tax positions exist, the Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances. As of March 31, 2020 and December 31, 2019, the Company did not have any significant uncertain tax positions and no interest or penalties have been charged. The Company's practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company is subject to routine audits by taxing jurisdictions.

Subsequent Events

The Company’s management reviewed all material events through the date that the financial statements were issued for subsequent event disclosure consideration.

Application of New Accounting Standards

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other,” which is intended to simplify the subsequent measurement of goodwill. The pronouncement allows an entity, during its annual or interim goodwill impairment evaluation, to compare the fair value of a reporting unit with its carrying amount. An impairment charge is immediately recognized by which the carrying amount exceeds the fair value. This ASU is effective for fiscal

years, and interim periods within those years, beginning after December 15, 2019. The Company does not expect adoption of this ASU to have a material impact on its consolidated financial statements.

Pronouncements Not Yet Adopted

In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes (Topic 740). The guidance eliminates certain exceptions for recognizing deferred taxes for investments, performing intra-period

allocation and calculating income taxes in interim periods. This guidance also includes guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. ASU 2019-12 is effective for annual and interim periods in fiscal years beginning after December 15, 2020. Early adoption is permitted. The Company is currently evaluating the impact this change will have on its consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement of all expected credit losses for financial assets including trade receivables held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Subsequent to the issuance of ASU 2016-13, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. This ASU does not change the core principle of the guidance in ASU 2016-13, instead these amendments are intended to clarify and improve operability of certain topics included within the credit losses guidance. The FASB also subsequently issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Derivatives and Hedging (Topic 815), and Financial Instruments (Topic 842), which did not change the core principle of the guidance in ASU 2016-13 but clarified that expected recoveries of amounts previously written off and expected to be written off should be included in the valuation account and should not exceed amounts previously written off and expected to be written off. The guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019 for public business entities, excluding smaller reporting companies. Early adoption is permitted. As a smaller reporting company, the guidance will be effective for the Company during the first quarter of 2023. The Company is in the process of assessing the impact adoption will have on its consolidated financial statements.

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)		3 Months Ended
	Jul. 19, 2019	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares	Dec. 31, 2019 USD ($)
Class of Stock [Line Items]
Grant contract amount		$ 0		$ 1,000,000.0
Impairment charges of long-lived assets		$ 0	$ 110,474
Antidilutive securities excluded from computation of earnings per share (shares) | shares		10,597,729	30,395
Common Stock
Class of Stock [Line Items]
Conversion ratio	25

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REVERSE ACQUISITION AND DISPOSAL - Schedule of Unaudited Pro Forma Results (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Combinations [Abstract]
Revenues	$ 1,132,830	$ 655,635
Net loss	$ (2,083,816)	$ (9,415,074)
Net loss per share (in dollars per share)	$ (0.22)	$ (3.97)

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EQUITY-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Fair Value Assumptions

The fair value of the option grants of $92,007 has been estimated with the following assumptions for the three months ended March 31, 2020:

Risk-free interest rate	0.48	%
Volatility	113.17	%
Expected life (years)	5.80
Expected dividend yield	0	%

Summary of Stock Option Activity

The following table summarizes stock option activity for employees and non-employees for the three months ended March 31, 2020:

	Shares	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at December 31, 2019	166,233	$	34.42	6.53	$	—
Granted	182,000	0.61
Forfeited	(10,000)	—
Outstanding at March 31, 2020	338,233	$	17.01	8.18	$	—
Exercisable at March 31, 2020	84,711	$	59.85	3.23	$	—

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REVERSE ACQUISITION AND DISPOSAL - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - Flex Pharma	Jul. 19, 2019 USD ($)
Business Acquisition [Line Items]
Cash	$ 5,405,826
Accounts receivable	15,168
Inventory	122,235
Prepaid expense and other current assets	106,319
Goodwill and intangibles	8,937,899
Total fair value of assets acquired	14,587,447
Accounts payable, accrued liabilities and other current liabilities	1,862,599
Total fair value of liabilities assumed	1,862,599
Net assets acquired	$ 12,724,848

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REVERSE ACQUISITION AND DISPOSAL (Tables)

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Summary of Purchase Consideration

Total purchase consideration is as follows:

Flex Pharma market capitalization at closing	$	10,963,526
Fair value of rights to warrants	1,629,095
Fair value of Flex Pharma outstanding options on the merger date	132,227
Total purchase consideration	$	12,724,848

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following represents the allocation of the estimated purchase consideration:

Fair value of assets acquired
Cash	$	5,405,826
Accounts receivable	15,168
Inventory	122,235
Prepaid expense and other current assets	106,319
Goodwill and intangibles	8,937,899
Total fair value of assets acquired	14,587,447
Fair value of liabilities assumed
Accounts payable, accrued liabilities and other current liabilities	1,862,599
Total fair value of liabilities assumed	1,862,599
Net assets acquired	$	12,724,848

Schedule of Unaudited Pro Forma Results

The following unaudited pro forma financial information summarizes the results of operations for the three months ended March 31, 2020 and 2019 as if the merger described above had been completed as of January 1, 2019. Pro forma information primarily reflects adjustments relating to the reversal of transaction costs. Assuming that the merger had been completed as of January 1, 2019, the transaction costs would have been expensed in the prior period.

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Revenues	$	1,132,830	$	655,635
Net loss	(2,083,816)		(9,415,074)
Net loss per share	(0.22)		(3.97)

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GRANTS RECEIVABLE	3 Months Ended
	Mar. 31, 2020
Receivables [Abstract]
GRANTS RECEIVABLE	GRANTS RECEIVABLEGrants receivable represents qualifying costs incurred and there is reasonable assurance that conditions of the grant have been met but the corresponding funds have not been received as of the reporting date. Grants receivable balances are $591,129 and $0 as of March 31, 2020 and December 31, 2019, respectively.

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STOCKHOLDERS' EQUITY

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY

The accompanying condensed consolidated statements of stockholders' equity (deficit) and the footnotes to the interim financial statements have been retroactively adjusted to reflect the equity structure (that is, the number and type of equity interests issued) of Flex Pharma, the legal parent (accounting acquiree) of the merger closed on July 19, 2019, with the retained earnings and other equity balances of the Private Salarius before the merger. Private Salarius' equity was restated using the exchange ratio established in the merger agreement to reflect the number of shares of Flex Pharma issued in the merger. Concurrent with the merger, the Company's shareholders approved a 1-for-25 reverse stock split, which became effective on July 19, 2019. Total shares owned by Flex Pharma pre-merger shareholders (net of fraction shares paid in cash) was 8,353,480 shares after reverse stock-split.

Common Stock and Preferred Stock

On February 11, 2020, the Company completed a public offering with total gross proceeds of approximately $11.0 million, which includes the full exercise of the underwriter's over-allotment option to purchase an additional 1,252,173 shares and warrants prior to deducting underwriting discounts and commissions and offering expenses payable by Salarius. The offering is comprised of 7,101,307 Class A units, priced at a public offering price of $1.15 per unit, with each unit consisting of one share of common stock and a five-year warrant to purchase one share of

common stock at an exercise price of $1.15 per share, and 1,246,519 Class B units, priced at a public offering price of $1.15 per unit, with each unit consisting of one share of Series A convertible preferred stock and a five-year warrant to purchase one share of common stock with and exercise price of $1.15 per share. A total of 8,343,480 shares of common stock, 1,246,519 shares of Series A convertible preferred stock, and warrants to purchase up to 9,599,999 shares of common stock were issued in the offering, including the full exercise of the over-allotment option. The convertible preferred stock issued in this transaction includes a beneficial ownership limitation on conversion, but has no dividend rights (except to the extent that dividends are also paid on the common stock). The conversion price of the Series A convertible preferred stock in the offering as well as the exercise price of the warrants are fixed and do not contain any variable pricing features or any price based anti-dilutive features.

In February 2020, 777,825 shares of Series A convertible preferred stock were converted to common stock.

During the three months ended March 31, 2019 the Company issued 960,489 common shares (4,035 Series A preferred units and 350 profit interest units of Private Salarius) for $4,377,591 (net of offering cost of $10,617).

In December 2018, the Company agreed to issue an unrelated party 12,907 common shares (91 common units of Private Salarius) to acquire licenses for the DNMT1 inhibitor. The issuance was approved in January 2019 and the license was granted in 2018. .

Right to Warrants

Pursuant to the Merger Agreement (See Note 3), Flex Pharma distributed one right per share of common stock to stockholders of record as of the close of business on July 18, 2019. Each right entitles such stockholders to receive a warrant to purchase the Company's common shares on January 20, 2020. These warrants are exercisable, in the aggregate, into 142,711 shares of the Company's common stock with a 5-year term from January 20, 2020, and an exercise price of $15.17 per share. The warrants are subject to a cashless exercise, at the option of the Company, at the closing of an issuance and sale of the Company’s common stock in certain qualified financing, upon the closing of which the holders of warrants shall be entitled to receive a number of shares of common stock equal to the greater of two formulae defined by the Merger Agreement, which are based on the volume weighted average price of the Company's common stock during the 10 consecutive trading days ending on the trading day immediately preceding the date of exercise. As a result, the warrants have been classified as a liability.

The Company accounted for these warrants at fair value using Level 3 inputs. The Company determined the fair value of this warrant liability using a Black-Scholes valuation model as the Company believes the value will closely approximate the value from the binomial asset pricing model that consisted of a conditional probability weighted expected return method that values the Company’s equity securities assuming various possible future outcomes to estimate the allocation of value within one or more of the scenarios. Using this method, unobservable inputs included the Company’s equity value, expected timing of possible outcomes, risk free interest rates and stock

price volatility.

Variables used in the Black-Scholes model are as follows:

	March 31, 2020	December 31, 2019
Discount rate	0.37%	1.69%
Expected life (years)	4.81 years	5.06 years
Expected volatility	113.17%	103.07%
Expected dividend	—%	—%

Wedbush Warrant

On July 19, 2019, upon the closing of the merger, the Company elected to issue warrants to purchase 42,928 common shares to Wedbush Securities Inc. ("Wedbush") to satisfy $500,000 of the $1,000,000 success fee payable to Wedbush at the closing of the merger. The remaining $500,000 success fee was paid in cash. These warrants have an exercise price of $18.90 and a 5-year term. As of March 31, 2020, all warrants issued to Wedbush were outstanding.

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REVERSE ACQUISITION AND DISPOSAL

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

REVERSE ACQUISITION AND DISPOSAL

REVERSE ACQUISITION AND DISPOSAL

Reverse Acquisition

On January 3, 2019, Flex Pharma, Private Salarius and Merger Sub entered into the Merger Agreement. Pursuant to the Merger Agreement, Merger Sub merged with and into Private Salarius, with Private Salarius continuing as a wholly owned subsidiary of Flex Pharma, with Flex Pharma deemed the legal acquiror and Private Salarius deemed the accounting acquiror, as described below. The merger was completed on July 19, 2019. After the merger, Flex Pharma was renamed Salarius Pharmaceuticals, Inc. The merger was accounted for as a reverse acquisition business acquisition with Private Salarius being deemed the acquiring company for accounting purposes. Private Salarius, as the accounting acquirer, recorded the assets acquired and liabilities assumed of Flex Pharma in the merger at their fair values as of the acquisition date. Private Salarius’ historical financial statements have replaced Flex Pharma’s historical consolidated financial statements with respect to periods prior to the completion of the merger with retroactive adjustments to Private Salarius' legal capital to reflect the legal capital of Flex Pharma. Flex Pharma (which was renamed Salarius Pharmaceuticals, Inc. in connection with the merger) remains the continuing registrant and reporting company.

Private Salarius was determined to be the accounting acquirer based on the following facts and circumstances: (1) members of Private Salarius owned approximately 80.7% of the voting interests of the combined company immediately following the closing of the transaction; (2) the majority of the board of directors of the combined company was composed of directors designated by Private Salarius under the terms of the Merger Agreement; and (3) existing members of Private Salarius management became the management of the combined company.

The business purposes of the merger included, among other purposes, obtaining the following potential advantages: (i) the combined organization’s resources would be immediately available to support Private Salarius’ research on Seclidemstat; and (ii) the public company status would allow the Company greater potential access to additional capital.

At the closing of the merger, each outstanding common unit, profits interest common unit and Series A Preferred unit of Private Salarius converted into shares of the Company’s common stock (subject to the payment of cash in lieu of fractional shares and after giving effect to a 25 to 1 reverse stock split of the Company’s common stock) at the conversion ratio formulae described in the Merger Agreement.

In addition, at the closing of the merger, the Company distributed one right per share of common stock to stockholders of record as of the close of business on July 18, 2019. Each right entitles such stockholders to receive

a warrant to purchase shares of the Company’s common stock six months and one day following the closing date of the merger. See Note 8.

The Company accounted for the acquisition as a reverse merger using purchase accounting. Because the merger qualifies as a reverse acquisition and given that Private Salarius was a private company at the time of the merger and therefore its value was not readily determinable, the fair value of the merger consideration was deemed to be equal to the sum of the quoted market capitalization of the Company at the merger date, the fair value of the Flex Pharma options that fully vested upon the merger together, and the fair value of the rights to receive warrants that were granted to the pre-merger Flex Pharma stockholders. Total purchase consideration is as follows:

Flex Pharma market capitalization at closing	$	10,963,526
Fair value of rights to warrants	1,629,095
Fair value of Flex Pharma outstanding options on the merger date	132,227
Total purchase consideration	$	12,724,848

The Company recorded all tangible and intangible assets acquired and liabilities assumed at their preliminary estimated fair values on the merger date. The following represents the allocation of the estimated purchase consideration:

Fair value of assets acquired
Cash	$	5,405,826
Accounts receivable	15,168
Inventory	122,235
Prepaid expense and other current assets	106,319
Goodwill and intangibles	8,937,899
Total fair value of assets acquired	14,587,447
Fair value of liabilities assumed
Accounts payable, accrued liabilities and other current liabilities	1,862,599
Total fair value of liabilities assumed	1,862,599
Net assets acquired	$	12,724,848

Unaudited Pro Forma Disclosure

The following unaudited pro forma financial information summarizes the results of operations for the three months ended March 31, 2020 and 2019 as if the merger described above had been completed as of January 1, 2019. Pro forma information primarily reflects adjustments relating to the reversal of transaction costs. Assuming that the merger had been completed as of January 1, 2019, the transaction costs would have been expensed in the prior period.

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Revenues	$	1,132,830	$	655,635
Net loss	(2,083,816)		(9,415,074)
Net loss per share	(0.22)		(3.97)

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COVER PAGE - shares	3 Months Ended
	Mar. 31, 2020	May 05, 2020
Cover [Abstract]
Entity Registrant Name	SALARIUS PHARMACEUTICALS, INC.
Entity Central Index Key	0001615219
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q/A
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		13,650,752
Entity Current Reporting Status	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $ 0.0001 par value
Trading Symbol	SLRX
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-36812
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2450 Holcombe Blvd
Entity Address, Address Line Two	Suite J 608
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77021
Entity Tax Identification Number	46-5087339
City Area Code	346
Local Phone Number	772-0346
Entity Interactive Data Current	Yes

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EQUITY-BASED COMPENSATION - Summary of stock option activity (Details) - USD ($)		3 Months Ended	12 Months Ended
	Sep. 10, 2019	Mar. 31, 2020	Dec. 31, 2019
Shares
Outstanding, Beginning Balance (shares)		166,233
Granted (shares)	182,000	182,000
Forfeited (shares)		(10,000)
Outstanding, Ending Balance (shares)		338,233	166,233
Exercisable (shares)		84,711
Weighted-Average Exercise Price
Weighted-average exercise price, Beginning Balance (in usd per share)		$ 34.42
Granted, weighted-average exercise price (in usd per share)		0.61
Forfeited, weighted-average exercise price (in usd per share)		0
Weighted-average exercise price, Ending Balance (in usd per share)		17.01	$ 34.42
Exercisable, weighted-average exercise price (in usd per share)		$ 59.85
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted-average remaining contractual term		8 years 2 months 4 days	6 years 6 months 10 days
Exercisable, weighted-average remaining contractual term		3 years 2 months 23 days
Outstanding, aggregate intrinsic value		$ 0	$ 0
Exercisable, aggregate intrinsic value		$ 0

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STOCKHOLDERS' EQUITY - Narrative (Details)			1 Months Ended	3 Months Ended
	Feb. 11, 2020 USD ($) $ / shares shares	Jul. 19, 2019 USD ($) trading_Days $ / shares shares	Dec. 31, 2018 shares	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares	Dec. 31, 2019 shares	Jan. 20, 2019
Class of Stock [Line Items]
Common stock, shares outstanding				13,645,677		4,511,174
Shares issued, value | $				$ 9,467,166	$ 4,377,591
Expected life (years)				4 years 9 months 21 days		5 years 21 days	5 years
Exercise price (in dollars per share) | $ / shares		$ 15.17
Number of shares called by warrants		142,711
Offering costs | $					10,617
Consecutive trading days | trading_Days		10
Over-Allotment Option
Class of Stock [Line Items]
Shares issued, value | $	$ 11,000,000.0
Shares issued	1,252,173
Common Stock
Class of Stock [Line Items]
Conversion ratio		25
Shares issued, value | $				$ 835	$ 96
Shares issued	8,343,480			8,353,480	960,489
Number of rights per share		1
Number of shares called by warrants	9,599,999
Preferred shares converted to common shares (shares)				777,825
Issuance of equity securities for license (shares)			12,907		12,907
Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Expected life (years)	5 years
Number of rights per share	1
Exercise price (in dollars per share) | $ / shares	$ 1.15
Common Stock | Flex Pharma
Class of Stock [Line Items]
Conversion ratio		25
Common stock, shares outstanding		8,353,480
Preferred Stock
Class of Stock [Line Items]
Shares issued, value | $				$ 125
Shares issued				1,246,519
Preferred shares converted to common shares (shares)				(777,825)
Class A | Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Number of shares issued	7,101,307
Price per share (usd per share) | $ / shares	$ 1.15
Class B | Preferred Stock | Over-Allotment Option
Class of Stock [Line Items]
Number of shares issued	1,246,519
Price per share (usd per share) | $ / shares	$ 1.15
Series A Preferred | Common Stock
Class of Stock [Line Items]
Shares issued					4,035
Preferred shares converted to common shares (shares)	777,825
Series A Preferred | Preferred Stock
Class of Stock [Line Items]
Shares issued	1,246,519
Profit Interest Units | Common Stock
Class of Stock [Line Items]
Shares issued					350
Common Units | Common Stock
Class of Stock [Line Items]
Issuance of equity securities for license (shares)			91
Wedbush | Satisfy success fee
Class of Stock [Line Items]
Expected life (years)		5 years
Exercise price (in dollars per share) | $ / shares		$ 18.90
Number of shares called by warrants		42,928
Warrant value | $		$ 500,000
Due to related party | $		1,000,000
Cash payment to related party | $		$ 500,000

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net loss	$ (2,083,816)	$ (1,522,076)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and impairment	4,233	114,707
Equity-based compensation expense	38,409	35,407
Change in fair value of warrant liability	(283,070)	0
Changes in operating assets and liabilities:
Grants receivable	(591,129)	0
Prepaid expenses and other current assets	298,959	30,743
Accounts payable	(911,301)	589,700
Accrued expenses and other current liabilities	361,382	(462,816)
Due to/from related party	0	1,256
Deferred revenue	(541,701)	(655,634)
Net cash used in operating activities	(3,708,034)	(1,868,713)
Financing activities
Proceeds from issuance of equity securities, net	9,865,727	1,508,179
Payments on note payable	(249,653)	0
Net cash provided by financing activities	9,616,074	1,508,179
Net increase (decrease) in cash, cash equivalents and restricted cash	5,908,040	(360,534)
Cash, cash equivalents and restricted cash at beginning of period	3,738,900	6,131,781
Cash, cash equivalents and restricted cash at end of period	9,646,940	5,771,247
Supplemental disclosure of cash flow information:
Cash paid for interest	3,061	0
Non-cash investing and financing activities:
Accrued issuance costs for public offering	398,561	0
Issuance of shares for license	0	110,474
Conversion of liabilities to equity	$ 0	$ 2,869,412

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Summary of Changes in Fair Value of Level 3 Liabilities

The following table sets forth a summary of changes in the fair value of Level 3 liabilities, the warrant associated with the Flex Pharma merger measured at fair value on a recurring basis for the three months ended March 31, 2020:

Description	Balance at December 31, 2019		Change in Fair Value		Balance at March 31, 2020
Warrant liability	$	317,762	$	283,070	$	34,692

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REVERSE ACQUISITION AND DISPOSAL - Narrative (Details)	Jul. 19, 2019 shares
Business Acquisition [Line Items]
Period the right is unexercisable	6 months
Common Stock
Business Acquisition [Line Items]
Conversion ratio	25
Number of rights per share	1
Flex Pharma
Business Acquisition [Line Items]
Voting interest acquired	80.70%

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GRANTS RECEIVABLE (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Grants receivable from CPRIT	$ 591,129	$ 0

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	468,694	468,694
Preferred stock, shares outstanding	468,694	468,694
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	13,650,838	4,519,533
Common stock, shares outstanding	13,645,677	4,511,174

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EQUITY-BASED COMPENSATION - Narrative (Details) - USD ($)		3 Months Ended
	Sep. 10, 2019	Mar. 31, 2020	Dec. 31, 2019	Jul. 19, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding		338,233	166,233	90,279
Number of stock options granted (shares)	182,000	182,000
Fair value		$ 92,007
Unrecognized compensation cost, options		$ 489,641
Unrecognized compensation cost, recognition period		3 years 3 months 7 days
Employee stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, contractual term		10 years
Minimum | Employee stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Maximum | Employee stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining available for grant of stock awards (shares)		34,087

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	1 Months Ended		3 Months Ended
	May 31, 2019	Jun. 30, 2016	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2011
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Award amount		$ 18,700,000
Award term		3 years
Extension term	6 months
Continued payments, percent of net sales			1.00%
Matching funds requirement			50.00%
Aggregate amount received			$ 9,600,000
Current funding available			9,100,000
Current funding received			0
Deferred revenue			0	$ 541,701
Grants receivable from CPRIT			$ 591,129	$ 0
University of Utah Research Foundation
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership percentage by noncontrolling Owner					2.00%

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ORGANIZATION AND OPERATIONS

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION AND OPERATIONS

ORGANIZATION AND OPERATIONS

Nature of Business

Salarius Pharmaceuticals, Inc. (“Salarius” or the “Company”), together with its subsidiaries, Salarius Pharmaceuticals, LLC, Flex Innovation Group LLC, and TK Pharma, Inc., is a clinical-stage biotechnology company focused on developing effective treatments for cancers with high unmet medical need caused by dysregulated gene expression. Epigenetics refers to the regulatory system that affects gene expression and the Company's lead epigenetic enzyme technology was licensed from the University of Utah Research Foundation in 2011. The Company is located in Houston, Texas.

Merger with Flex Pharma, Inc.

On January 3, 2019, Flex Pharma, Inc. ("Flex Pharma"), Salarius Pharmaceuticals LLC ("Private Salarius") and Falcon Acquisition Sub, LLC (“Merger Sub”), a wholly owned subsidiary of Flex Pharma, entered into an Agreement and Plan of Merger (the “Merger Agreement”). Pursuant to the Merger Agreement, Merger Sub merged with and into Private Salarius, with Private Salarius continuing as a wholly owned subsidiary of Flex Pharma. The merger was completed on July 19, 2019. After the merger, Flex Pharma was renamed Salarius Pharmaceuticals, Inc. The merger was accounted for as a reverse acquisition with Private Salarius being deemed the acquiring company for accounting purposes. See Note 3.

Risks Related to Covid-19 Pandemic

The outbreak of COVID-19 has spread worldwide. On March 11, 2020, the World Health Organization declared the outbreak a pandemic. The COVID-19 pandemic is affecting the United States and global economies and may affect the Company’s operations and those of third parties on which the Company relies. While the potential economic impact brought by, and the duration of, the COVID-19 pandemic is difficult to assess or predict, the impact of the COVID-19 pandemic on the global financial markets may reduce the Company’s ability to access capital, which could negatively impact the Company’s long-term liquidity. The ultimate impact of the COVID-19 pandemic is highly uncertain and subject to change. The Company does not yet know the full extent of potential delays or impacts on its business, financing or other activities or on healthcare systems or the global economy as a whole. However, these effects could have a material impact on the Company’s liquidity, capital resources, operations and business and those of the third parties on which we rely.

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COMMITMENTS AND CONTINGENCIES

3 Months Ended

Mar. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

License Agreement with the University of Utah Research Foundation

In 2011, the Company entered into a license agreement with the University of Utah, under which, the Company acquired an exclusive license to and epigenetic enzyme lysine specific demethylase 1 ("LSD 1"). In exchange for the license, the Company issued 2% equity ownership in the Company based on a fully diluted basis at the effective date of the agreement and subject to certain adjustments specified in the agreement, granted revenue sharing rights on any resulting products or processes to commence on first commercial sale, and milestone payments based upon regulatory approval of any resulting product or process as well as on the second anniversary of first commercial sale.

Cancer Prevention and Research Institute of Texas

In June 2016, the Company entered into a Cancer Research Grant Contract with CPRIT. Pursuant to the contract, CPRIT awarded the Company a grant of up to $18.7 million to fund the development of LSD-1 inhibitor. This is a 3-year grant award which originally expired on May 31, 2019. However, a six-month extension was approved by CPRIT in May 2019 and an additional six-month extension through May 2020. The Company has applied for an extension with a proposed contract end date of November 30, 2020.

The Company will retain ownership over any intellectual property developed under the contract ("Project Result"). With respect to non-commercial use of any Project Result, the Company agreed to grant to CPRIT a nonexclusive, irrevocable, royalty-free, perpetual, worldwide license with right to sublicense any necessary additional intellectual property rights to exploit all Project Results by CPRIT, other governmental entities and agencies of the State of Texas, and private or independent institutions of higher education located in Texas, for education, research and other non-commercial purposes.

The Company is obligated to make revenue-sharing payments to CPRIT with respect to net sales of any product covered by the contract, up to a maximum repayment of certain percentage of the aggregate amount paid to the Company by CPRIT under the CPRIT contract. The payments are determined as a percentage of net sales, which may be reduced if the Company is required to obtain a license from a third party to sell any such product. In addition, upon meeting the foregoing limitation on revenue-sharing payments, the Company agreed to make continued revenue-sharing payments to CPRIT of less than 1% of net sales.

The CPRIT grant is subject to funding conditions including a matching funds requirement where the Company will match 50% of funding from the CPRIT grant. As of March 31, 2020, the Company has received an aggregate of $9.6 million from the CPRIT grant and there was $9.1 million of funds available for the Company to draw upon meeting certain requirements. There was no funding received from CPRIT during the three months ended March 31, 2020. At March 31, 2020 and December 31, 2019, the Company had deferred revenue of $0 and $541,701, respectively, related to the CPRIT contract. At March 31, 2020 and December 31, 2019, the Company had grants receivable of $591,129 and $0, respectively, related to the CPRIT contract.

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SUBSEQUENT EVENTS

3 Months Ended

Mar. 31, 2020

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS

On April 9, 2020, the Company was notified (the “Notice”) by Nasdaq Stock Market, LLC (“Nasdaq”) that on April 8, 2020 the average closing price of the Company’s common stock (the “Common Stock”) over the prior 30 consecutive trading days had fallen below $1.00 per share, which is the minimum average closing price required to maintain listing on Nasdaq under Nasdaq Listing Rule 5450(a)(1) (the “Minimum Bid Requirement”). The Notice has no immediate effect on the listing or trading of the Company’s common stock. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has 180 calendar days, to regain compliance with the Minimum Bid Requirement. To regain compliance, the closing bid price of the Company’s common stock must be at least $1.00 per share for a minimum of ten consecutive business days during this 180-day period.

On April 20, 2020, the Company was notified by Nasdaq that it has determined to toll the compliance periods for bid price and market value of publicly held shares (“MVPHS”) requirements (collectively, the “Price-based Requirements”) through June 30, 2020. In that regard, on April 16, 2020, Nasdaq filed an immediately effective rule change with the Securities and Exchange Commission. As a result, companies presently in compliance periods for any Price-based Requirements will remain at that same stage of the process and will not be subject to being delisted for these concerns. Starting on July 1, 2020, companies will receive the balance of any pending compliance period in effect at the start of the tolling period to regain compliance.

Accordingly, since the Company had 173 calendar days remaining in its bid price compliance period as of April 16, 2020, it will, upon reinstatement of the Price-based Requirements, still has 173 calendar days from July 1, 2020, or until December 21, 2020, subject to any extensions granted by Nasdaq, to regain compliance. The Company can regain compliance, either during the suspension or during the compliance period resuming after the suspension by evidencing compliance with the Price-based Requirements for a minimum of 10 consecutive trading days.

On April 13, 2020, the Company was granted a loan of approximately $180,000 from Paycheck Protection Program established under the CARES Act. The loan matures on April 13, 2022 and bears interest at a rate of 0.5% per annum. The loan will be forgiven if the Company use it to pay payroll costs including benefit, mortgage interest, rent, and utilities payment over the 8 weeks after getting the loan

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 9,646,940	$ 3,738,900
Grants receivable from CPRIT	591,129	0
Prepaid expenses and other current assets	646,360	955,899
Total current assets	10,884,429	4,694,799
Property and equipment, net	21,889	25,016
Goodwill	8,865,909	8,865,909
Other assets	293,147	308,674
Total assets	20,065,374	13,894,398
Current liabilities:
Accounts payable	979,823	1,790,966
Accrued expenses and other current liabilities	795,567	160,783
Note payable	252,679	502,332
Deferred revenue	0	541,701
Warrant liability	34,692	317,762
Total liabilities	2,062,761	3,313,544
Commitments and Contingencies
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; 468,694 issued and outstanding	47	0
Common stock, $0.0001 par value; 100,000,000 shares authorized; 13,650,838 and 4,519,533 shares issued at March 31, 2020 and December 31, 2019, and 13,645,677 and 4,511,174 shares outstanding at March 31, 2020 and December 31, 2019, respectively	1,364	451
Additional paid-in capital	32,161,718	22,657,103
Accumulated deficit	(14,160,516)	(12,076,700)
Total stockholders' equity	18,002,613	10,580,854
Total liabilities and stockholders' equity	$ 20,065,374	$ 13,894,398

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STOCKHOLDERS' EQUITY - Schedule of Variables used in Black-Scholes Model (Details)	Mar. 31, 2020	Dec. 31, 2019	Jan. 20, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Expected life (years)	4 years 9 months 21 days	5 years 21 days	5 years
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.37%	1.69%
Expected volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	113.17%	103.07%
Expected dividend
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants measurement input	0.00%	0.00%

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PREPAID EXPENSES AND OTHER CURRENT ASSETS - Narrative (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Jul. 31, 2019
Short-term Debt [Line Items]
Note payable	$ 252,679	$ 502,332
Note Payable
Short-term Debt [Line Items]
Principal amount			$ 900,000
Interest rate			4.61%

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) - USD ($)	Total	Common Stock	Preferred Stock	Additional Paid-In Capital	Accumulated Deficit
Equity, beginning balance (shares) at Dec. 31, 2018		2,032,763	0
Equity, beginning balance at Dec. 31, 2018	$ (1,271,114)	$ 203	$ 0	$ 3,869,120	$ (5,140,437)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of equity securities (shares)		960,489
Issuance of equity securities	4,377,591	$ 96		4,377,495
Issuance of equity securities for license (shares)		12,907
Issuance of equity securities for license	110,474	$ 1		110,473
Equity-based compensation expense (shares)		9,550
Equity-based compensation expense	35,407	$ 1		35,406
Net loss	(1,522,076)				(1,522,076)
Equity, ending balance (shares) at Mar. 31, 2019		3,015,709
Equity, ending balance at Mar. 31, 2019	1,730,282	$ 301		8,392,494	(6,662,513)
Equity, beginning balance (shares) at Dec. 31, 2019		4,511,174	0
Equity, beginning balance at Dec. 31, 2019	10,580,854	$ 451	$ 0	22,657,103	(12,076,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of equity securities (shares)		8,353,480	1,246,519
Issuance of equity securities	9,467,166	$ 835	$ 125	9,466,206
Preferred shares converted to common shares (shares)		777,825	(777,825)
Preferred shares converted to common shares	0	$ 78	$ (78)
Equity-based compensation expense (shares)		3,198
Equity-based compensation expense	38,409			38,409
Net loss	(2,083,816)				(2,083,816)
Equity, ending balance (shares) at Mar. 31, 2020		13,645,677	468,694
Equity, ending balance at Mar. 31, 2020	$ 18,002,613	$ 1,364	$ 47	$ 32,161,718	$ (14,160,516)

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SUBSEQUENT EVENTS (Details) - Subsequent Event - Loan Payable $ in Thousands	Apr. 13, 2020 USD ($)
Subsequent Event [Line Items]
Principal amount	$ 180
Interest rate	0.50%

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FAIR VALUE OF FINANCIAL INSTRUMENTS

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

FAIR VALUE OF FINANCIAL INSTRUMENTS

Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. A fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last is considered unobservable, are used to measure fair value:

Level 1 - Unadjusted 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; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Significant unobservable inputs including Salarius’ own assumptions in determining fair value.

The Company believes the recorded values of its financial instruments, including cash and cash equivalents, accounts payable and note payable approximate their fair values due to the short-term nature of these instruments.

The following table sets forth a summary of changes in the fair value of Level 3 liabilities, the warrant associated with the Flex Pharma merger measured at fair value on a recurring basis for the three months ended March 31, 2020:

Description	Balance at December 31, 2019		Change in Fair Value		Balance at March 31, 2020
Warrant liability	$	317,762	$	283,070	$	34,692

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States ("GAAP"). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standard Codification ("ASC") and Accounting Standards Update ("ASU") of the Financial Accounting Standards Board ("FASB").

As described above, the merger with Flex Pharma closed on July 19, 2019. The merger was accounted for as a reverse acquisition with Private Salarius being deemed the acquiring company for accounting purposes. Private Salarius’ historical financial statements have replaced Flex Pharma’s historical consolidated financial statements with respect to periods prior to the completion of the merger with retroactive adjustments to Private Salarius' legal capital to reflect the legal capital of Flex Pharma. Flex Pharma (renamed Salarius Pharmaceuticals, Inc.) remains the continuing registrant and reporting company. Accordingly, the historical financial and operating data of Salarius Pharmaceuticals, Inc., which covers periods prior to the closing date of the merger, reflects the assets, liabilities and results of operations of Private Salarius and does not reflect the assets, liabilities and results of operations of Flex Pharma for the periods prior to July 19, 2019. The Company has retrospectively adjusted its Statement of Changes in Stockholders’ Equity (Deficit) and the weighted average shares used in determining loss per common share to reflect the conversion of the outstanding common unit, profits interest common unit and Series A Preferred unit of

Private Salarius that converted into shares of the Company’s common stock upon the merger, and to reflect the effect of the 25 to 1 reverse stock split of the Company’s common stock which occurred upon the merger.

Principles of Consolidation

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant 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 as defined by the FASB ASC requires management to make estimates and assumptions that affect certain reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

Cash and Cash Equivalents

Cash and Cash EquivalentsSalarius considers all highly-liquid investments with original maturities of three months or less to be cash equivalents.

Impairment of Long-Lived Assets

Impairment of Long-Lived AssetsLong-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that their carrying value may not be recoverable. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset.

Goodwill

Goodwill

Goodwill is not amortized but is tested at least annually for impairment at the reporting unit level. The Company has determined that the reporting unit is the single operating segment disclosed in its current financial statements.

Impairment is the condition that exists when the carrying amount of goodwill exceeds its implied fair value. The first step in the impairment process is to determine the fair value of the reporting unit and then compare it to the carrying value, including goodwill. If the fair value exceeds the carrying value, no further action is required and no impairment loss is recognized. Additional impairment assessments may be performed on an interim basis if the Company encounters events or changes in circumstances that would indicate that, more likely than not, the carrying

value of goodwill has been impaired.

Financial Instruments and Credit Risks

Financial Instruments and Credit Risks

Financial instruments that potentially subject the Company to credit risk include cash and cash equivalents and restricted cash. Cash is deposited in demand accounts in federally insured domestic institutions to minimize risk. Insurance is provided through the Federal Deposit Insurance Corporation (“FDIC”). Although the balances in these accounts exceed the federally insured limit from time to time, the Company has not incurred losses related to these deposits.

Warrants

Warrants

In conjunction with the reverse merger transaction, the Company issued rights to receive warrants to purchase the Company’s common stock. Further, on February 11, 2020, the Company issued warrants to purchase the Company's common stock in a registered public offering. The Company determines whether the warrants should be classified as a liability or equity. For warrants classified as liabilities, the Company estimates the fair value of the warrants at each reporting period using Level 3 inputs with changes in fair value recorded in the Condensed Consolidated Statement of Operations within Change in fair value of warrant liability. The estimates in valuation models are based, in part, on subjective assumptions, including but not limited to stock price volatility, the expected life of the warrants, the risk-free interest rate and the fair value of the common stock underlying the warrants, and could differ materially in the future. The Company will continue to adjust the fair value of the warrant liability at the end of each reporting period for changes in fair value from the prior period until the earlier of the exercise or expiration of the applicable warrant.

Grants Receivable and Revenue Recognition

Grants Receivable and Revenue Recognition

Salarius’ source of revenue has been from a grant received from CPRIT. Grant revenue is recognized when qualifying costs are incurred and there is reasonable assurance that conditions of the grant have been met. Cash received from grants in advance of incurring qualifying costs is recorded as deferred revenue and recognized as revenue when qualifying costs are incurred. When grant funds are received after costs have been incurred, the Company records revenue and a corresponding grants receivable.

Research and Development Costs

Research and Development Costs

Research and development costs consist of expenses incurred in performing research and development activities, including pre-clinical studies and clinical trials. Research and development costs include salaries and personnel-related costs, consulting fees, fees paid for contract research services, the costs of laboratory equipment and facilities, license fees and other external costs. Research and development costs are expensed when incurred.

Equity-Based Compensation

Equity-Based Compensation

Salarius measures equity-based compensation based on the grant date fair value of the awards and recognizes the associated expense in the financial statements over the requisite service period of the award, which is generally the vesting period.

The Company uses the Black-Scholes option valuation model and the Backsolve method (which is similar to the Black-Scholes valuation model and produces similar results) to estimate the fair value of the stock-based compensation and incentive units. Assumptions utilized in these models including expected volatility calculated based on implied volatility from traded stocks of peer companies, dividend yield and risk-free interest rate. Additionally, forfeitures are accounted for in compensation cost as they occur.

Loss Per Share

Loss Per Share

Basic net loss per share is calculated by dividing the net loss applicable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Since the Company was in a loss position for all periods presented, diluted net loss per share is the same as basic net loss per share for all periods, as the inclusion of all potential common shares outstanding is anti-dilutive.

Income Taxes

Income Taxes

Income taxes are recorded in accordance with FASB ASC Topic 740, Income Taxes ("ASC 740"), which provides for deferred taxes using an asset and liability approach. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial reporting and the tax reporting basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company provides a valuation allowance against net deferred tax assets unless, based upon the available evidence, it is more likely than not that the deferred tax assets will be realized. The Company has evaluated available evidence and concluded that the Company may not realize the benefit of its deferred tax assets; therefore, a valuation allowance has been established for the full amount of the deferred tax assets.

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740. When uncertain tax positions exist, the Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances. As of March 31, 2020 and December 31, 2019, the Company did not have any significant uncertain tax positions and no interest or penalties have been charged. The Company's practice is to recognize interest and/or penalties related to income tax matters in income tax expense. The Company is subject to routine audits by taxing jurisdictions.

Subsequent Events

Subsequent Events

The Company’s management reviewed all material events through the date that the financial statements were issued for subsequent event disclosure consideration.

Application of New Accounting Standards and Pronouncements Not Yet Adopted

Application of New Accounting Standards

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other,” which is intended to simplify the subsequent measurement of goodwill. The pronouncement allows an entity, during its annual or interim goodwill impairment evaluation, to compare the fair value of a reporting unit with its carrying amount. An impairment charge is immediately recognized by which the carrying amount exceeds the fair value. This ASU is effective for fiscal

years, and interim periods within those years, beginning after December 15, 2019. The Company does not expect adoption of this ASU to have a material impact on its consolidated financial statements.

Pronouncements Not Yet Adopted

In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes (Topic 740). The guidance eliminates certain exceptions for recognizing deferred taxes for investments, performing intra-period

allocation and calculating income taxes in interim periods. This guidance also includes guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. ASU 2019-12 is effective for annual and interim periods in fiscal years beginning after December 15, 2020. Early adoption is permitted. The Company is currently evaluating the impact this change will have on its consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires the measurement of all expected credit losses for financial assets including trade receivables held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Subsequent to the issuance of ASU 2016-13, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. This ASU does not change the core principle of the guidance in ASU 2016-13, instead these amendments are intended to clarify and improve operability of certain topics included within the credit losses guidance. The FASB also subsequently issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Derivatives and Hedging (Topic 815), and Financial Instruments (Topic 842), which did not change the core principle of the guidance in ASU 2016-13 but clarified that expected recoveries of amounts previously written off and expected to be written off should be included in the valuation account and should not exceed amounts previously written off and expected to be written off. The guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019 for public business entities, excluding smaller reporting companies. Early adoption is permitted. As a smaller reporting company, the guidance will be effective for the Company during the first quarter of 2023. The Company is in the process of assessing the impact adoption will have on its consolidated financial statements.

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PREPAID EXPENSES AND OTHER CURRENT ASSETS - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid clinical trial expenses	$ 140,964	$ 202,743
Prepaid insurance	360,608	617,096
Other prepaid and current assets	144,788	136,060
Total prepaid expenses and other current assets	$ 646,360	$ 955,899

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STOCKHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Schedule of Variables used in Black-Scholes Model

Variables used in the Black-Scholes model are as follows:

	March 31, 2020	December 31, 2019
Discount rate	0.37%	1.69%
Expected life (years)	4.81 years	5.06 years
Expected volatility	113.17%	103.07%
Expected dividend	—%	—%

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REVERSE ACQUISITION AND DISPOSAL - Summary of Purchase Consideration (Details) - Flex Pharma	Jul. 19, 2019 USD ($)
Business Acquisition [Line Items]
Flex Pharma market capitalization at closing	$ 10,963,526
Fair value of rights to warrants	1,629,095
Fair value of Flex Pharma outstanding options on the merger date	132,227
Total purchase consideration	$ 12,724,848