Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2025

Accounting Policies [Abstract]

Liquidity, Policy [Policy Text Block]

Liquidity

Since our inception, we have financed our operations by raising debt, issuing equity and equity-linked instruments, and executing licensing arrangements, and to a lesser extent by generating royalties and product revenues. In mid-2019, we ceased ongoing operational activities as we worked to reach a favorable outcome to Medicare reimbursement coverage for the Aurix System. In April 2021, CMS issued an NCD mandating national reimbursement coverage for Aurix when used in chronic non-healing wounds where a clinical diagnosis of diabetes exists for the patient. During the year ended December 31, 2024, we sold 2,000,000 shares of common stock to certain accredited investors pursuant to Securities Purchase Agreements in two private placements which closed in May and September 2024 for total proceeds of $1,500,000. During the six months ended June 30, 2025, we received an upfront distribution fee of $1.5 million from Smith+Nephew in conjunction with the private label distribution agreement. See Note 4 – Distribution Agreement with Smith+Nephew for additional information. We have incurred, and continue to incur, recurring losses. As of June 30, 2025, we have an accumulated deficit of approximately $33.7 million and cash of approximately $0.3 million.

The accompanying unaudited consolidated financial statements have been prepared assuming that we will continue as a going concern, which contemplates continuity of operations, realization of assets, and satisfaction of liabilities in the ordinary course of business. The propriety of using the going-concern basis is dependent upon, among other things, the achievement of future profitable operations, the ability to generate sufficient cash from operations, and potential other funding sources, including cash on hand, to meet our obligations as they become due.

We believe based on the operating cash requirements and capital expenditures expected for the next twelve months that our current resources and projected revenue from sales of Aurix products are insufficient to support our operations for the next 12 months from the date these financial statements are issued. As such, we believe that substantial doubt about our ability to continue as a going concern exists. The unaudited consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Even assuming we succeed in raising sufficient additional funds in the near future, we require additional capital and will seek to continue financing our operations with external capital for the foreseeable future. Any equity financing may cause further substantial dilution to our stockholders and could involve the issuance of securities with rights senior to the common stock. Any debt financing may require us to comply with additional onerous financial covenants and restrict our business operations. Our ability to complete additional financings is dependent on, among other things, market reception of the Company and perceived likelihood of success of our business model, the state of the capital markets at the time of any proposed equity or debt offering, state of the credit markets at the time of any proposed loan financing, and on the relevant transaction terms, among other things. We may not be able to obtain additional capital as required to finance our efforts, through equity or debt financing, other transactions, or any combination thereof, on satisfactory terms or at all. Additionally, any such financing, if at all obtained, may not be adequate to meet our capital needs and to support our operations.

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation and Principles of Consolidation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Accordingly, they do not include all the information and footnotes required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). In our opinion, the accompanying unaudited consolidated financial statements include all adjustments, consisting of normal recurring adjustments, which are necessary to present fairly our financial position, results of operations and cash flows. The consolidated balance sheet at December 31, 2024, has been derived from our audited financial statements as of that date. The interim unaudited consolidated results of operations are not necessarily indicative of the results that may occur for the full fiscal year. Certain information and footnote disclosure normally included in financial statements prepared in accordance with U.S. GAAP have been omitted pursuant to instructions, rules and regulations prescribed by the SEC. We believe that the disclosures provided herein are adequate to make the information presented not misleading when these unaudited condensed consolidated financial statements are read in conjunction with the audited financial statements and notes previously included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024.

The unaudited consolidated financial statements include the accounts of the Company and its wholly owned, controlled, and inactive subsidiary Aldagen, Inc. (“Aldagen”). All significant inter-company accounts and transactions are eliminated in consolidation. The Company operates its business in one operating segment consisting of one reporting unit.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. In the accompanying unaudited condensed consolidated financial statements, estimates are used for, but not limited to stock-based compensation, recoverability and depreciable lives of long-lived assets, deferred taxes, and associated valuation allowance and allowances for inventory obsolescence and credit losses. Actual results could differ from those estimates.

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Credit Concentration

We generate accounts receivable from the sale of our products. Specific customer receivable balances in excess of 10% of total receivables at June 30, 2025 and December 31, 2024 is listed below.

		June 30, 2025				December 31, 2024

Customer A			13	%			-
Customer B			*				16	%
Customer C			*				14	%
Customer D			*				11	%

* less than 10%

Revenues from significant customers exceeding 10% of total revenues for the three and six months ended June 30, 2025 and June 30, 2024 is listed below. All our revenue for both periods was generated within the U.S.

		Three Months Ended June 30, 2025				Three Months Ended June 30, 2024

Customer E			11	%			*
Customer F			11	%			-
Customer G			10	%			-
Customer C			*				25	%
Customer D			*				12	%

		Six Months Ended June 30, 2025				Six Months Ended June 30, 2024

Customer E			15	%			*
Customer G			14	%			-
Customer D			11	%			*
Customer C			*				21	%

Historically, we have used single suppliers for several components of the Aurix product line. We outsource the manufacturing of various product components to contract manufacturers. While we believe these manufacturers demonstrate competency, reliability and stability, there is no assurance that one or more of them will not experience an interruption or inability to provide us with the products needed to satisfy customer demand. Additionally, while most of the components of Aurix are generally readily available on the open market, a reagent, bovine thrombin, is available exclusively through Pfizer, with whom we have an established vendor relationship.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash

When applicable, we consider all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents. We maintain our cash in the form of money market deposit accounts with financial institutions that we believe are credit worthy.

Receivable [Policy Text Block]

Accounts Receivable, net

We generate accounts receivable from the sale of the Aurix products and accounts receivable as of June 30, 2025 and December 31, 2024 reflect customer receivables from commercial sales activities.

We provide for an allowance against receivables for estimated losses that may result from a customer’s inability or unwillingness to pay. We estimate credit losses expected over the life of our trade receivables and contract assets based on historical information combined with current conditions that may affect a customer’s ability to pay and reasonable and supportable forecasts. While the Company uses various credit quality metrics, it primarily monitors collectability by reviewing the duration of collection pursuits on its delinquent trade receivables and historical write-off trends. Based on the Company’s experience, the customer's delinquency status, which is analyzed periodically, is the strongest indicator of the credit quality of the underlying trade receivables. Accounts are written off against the allowance for credit losses when we determine that amounts are not collectable. Recoveries of previously written-off accounts are recorded when collected. For the six month periods ending June 30, 2025 and 2024, we recorded provisions for credit losses of $12,525 and $17,500, respectively. As of June 30, 2025 and December 31, 2024, the allowance for credit losses was approximately $40,000 and $25,000, respectively.

Inventory, Policy [Policy Text Block]

Inventory, net

Our inventory is produced by third-party manufacturers and consists of raw materials and finished goods. Inventory cost is determined on a first-in, first-out basis and is stated at the lower of cost or net realizable value. We maintain an inventory of kits, reagents, and other disposables having shelf-lives that generally range from 12 months to two years.

As of June 30, 2025, our inventory consisted of approximately $94,000 of finished goods inventory and approximately $72,000 of raw materials acquired to facilitate the manufacturing of finished goods at our contract manufacturer and our warehouse/distribution facility. As of December 31, 2024, our inventory consisted of approximately $89,000 of finished goods inventory and approximately $61,000 of raw materials.

We provide for an allowance against inventory for estimated losses that may result in excess and obsolete inventory (i.e., from the expiration of products). Our allowance for expired inventory is estimated based upon the inventory’s remaining shelf-life and our anticipated ability to sell such inventory, which is estimated using past experience and future forecasts, within its remaining shelf life. Expired products are segregated and used for demonstration purposes only; we record the associated expense for this reserve to cost of sales in the consolidated statements of operations. For the six months ended June 30, 2025 we recorded a provision for inventory obsolescence of $9,119 and maintained a reserve for inventory obsolescence as of June 30, 2025 of $12,500. As of December 31, 2024, the reserve for inventory obsolescence was $18,675.

Property, Plant and Equipment, Policy [Policy Text Block]

Property and Equipment, net

Property and equipment is stated at cost less accumulated depreciation. Assets are depreciated, using the straight-line method, over their estimated useful life ranging from one to six years. Maintenance and repairs are charged to operations as incurred.

Lessee, Leases [Policy Text Block]

Leases

At the inception of a contract, we determine if the arrangement is, or contains, a lease. Right-of-use (“ROU”) assets represent our right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Rent expense is recognized on a straight-line basis over the lease term.

We have made certain accounting policy elections whereby we (i) do not recognize ROU assets or lease liabilities for short-term leases (those with original terms of 12-months or less) and (ii) combine lease and non-lease elements of any operating leases.

Revenue [Policy Text Block]

Revenue Recognition

We analyze our revenue arrangements to determine the appropriate revenue recognition using the following steps: (i) identification of contracts with customers; (ii) identification of distinct performance obligations in the contract; (iii) determination of contract transaction price; (iv) allocation of contract transaction price to the performance obligations; and (v) determination of revenue recognition based on timing of satisfaction of the performance obligation. We recognize revenues upon the satisfaction of the performance obligations (upon transfer of control of promised goods or services to customers) in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. In certain instances where the revenue is variable and we cannot estimate the amount of consideration to which we expect to be entitled, we are constrained from initially recognizing revenue. In these cases, once the estimate is no longer constrained, we recognize revenue in the amount of consideration to which we expect to be entitled. The Smith+Nephew upfront distribution fee will be recognized ratably as revenue on a straight-line basis over the initial 5-year term of the Distribution Agreement.

We provide for the sale of our products, including disposable processing sets and supplies to customers. Revenue from the sale of products is recognized upon shipment of products to the customers. We do not maintain a reserve for returned products, as in the past those returns have not been material and are not expected to be material in the future. Direct costs associated with product sales are recorded at the time that revenue is recognized.

Share-Based Payment Arrangement [Policy Text Block]

Stock-Based Compensation

The fair value of employee stock options is measured at the date of grant. Expected volatilities for options are based on the equally weighted average historical volatility from comparable public companies with an expected term consistent with ours. Expected years until exercise represents the period of time that options are expected to be outstanding. The risk-free rate for periods within the expected life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. We assume that the dividend rate on our common stock will be zero. For the options granted during the six months ended June 30, 2025, we used a risk-free rate of 4.06%, an expected term of 5.5 years, and an expected stock volatility of 75%. There were no options granted during the six months ended June 30, 2024. We have elected to recognize forfeitures of stock-based awards as they occur.

Income Tax, Policy [Policy Text Block]

Income Taxes

We account for income taxes using the asset and liability method. Under the asset and liability method, current income tax expense or benefit is the amount of income taxes expected to be payable or refundable for the current year. Tax rate changes are reflected in income during the period such changes are enacted. We measure our deferred tax assets and liabilities using the enacted tax rates that we believe will apply in the years in which the temporary differences are expected to be recovered or paid. We expect that recent tax law changes contained in the Inflation Reduction Act and CHIPS Act will not have a material impact on the provision for income taxes.

A deferred income tax asset or liability is recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and tax credits and loss carryforwards. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. All of our tax years remain subject to examination by the tax authorities.

Our policy for recording interest and penalties associated with audits is to record such items as a component of income before taxes. There were no such items in the six months ended June 30, 2025 and 2024.

Fair Value Measurement, Policy [Policy Text Block]

Fair Value Measurements

Our consolidated balance sheets may include certain financial instruments that are carried at fair value. Fair value is the price that would be received from the sale of an asset or paid to transfer a liability assuming an orderly transaction in the most advantageous market at the measurement date. U.S. GAAP establishes a hierarchical disclosure framework which prioritizes and ranks the level of observability of inputs used in measuring fair value. These tiers include:

●	Level 1, defined as observable inputs such as quoted prices in active markets for identical assets;
●	Level 2, defined as observable inputs other than Level 1 prices such as quoted prices for similar assets; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and
●	Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

An asset or liability’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. At each reporting period, if applicable, we perform a detailed analysis of our assets and liabilities that are measured at fair value. All assets and liabilities for which the fair value measurement is based on significant unobservable inputs or instruments which trade infrequently and therefore have little or no price transparency are classified as Level 3.

Earnings Per Share, Policy [Policy Text Block]

Basic and Diluted Loss per Share

In periods of net loss, basic loss per share is computed by dividing net loss available to common stockholders by the weighted average number of shares of common stock outstanding during the period. In periods of net loss, diluted loss per share is calculated similarly to basic loss per share because the impact of all potential dilutive common shares is anti-dilutive.

For periods of net income, diluted earnings per share is computed using the more dilutive of the “treasury method” or “two class method.” Dilutive earnings per share under the “treasury method” is calculated by dividing net income available to common stockholders by the weighted- average number of shares outstanding plus the dilutive impact of all potential dilutive common shares, consisting primarily of common shares underlying common stock options and stock purchase warrants using the treasury stock method, and convertible notes using the if-converted method. Because none of the Company’s currently outstanding equity-linked financial instruments contain non-forfeitable rights to dividends, the “two class” method results in the same diluted earnings per share as the “treasury method.”

All of our potential dilutive securities are considered anti-dilutive for the six months ended June 30, 2025 and 2024. The following table sets forth the potential dilutive securities excluded from the calculation of diluted loss per share for the periods presented.

		Six months ended June 30, 2025				Six months ended June 30, 2024

Shares underlying:
Common stock options			3,334,958				3,189,167
Stock purchase warrants			200,000				450,000
Performance shares			300,000				300,000
			3,834,958				3,939,167

Segment Reporting, Policy [Policy Text Block]

Segment Information

Operating segments are defined as components of an enterprise (business activity from which it earns revenue and incurs expenses) for which discrete financial information is available and regularly reviewed by the chief operating decision maker ("CODM") in deciding how to allocate resources and in assessing performance. The Company’s CODM is its Chief Executive and Financial Officer. The Company views its operations and manages its business as a single operating and reporting segment. All the Company’s long-lived assets are in the United States.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Developments

In December 2023, the FASB issued final guidance in ASU No. 2023-09, Income Taxes (ASC 740): Improvements to Income Tax Disclosures requiring entities to provide additional information in the rate reconciliation and disclosures about income taxes paid. For public business entities, the guidance is effective for annual periods beginning after December 15, 2024. We are currently evaluating the effect of the adoption of this guidance.

We have evaluated all other issued and unadopted Accounting Standards Updates and believe the adoption of these standards will not have a material impact on our consolidated results of operations, financial position, or cash flows.