Heart Test Laboratories (HSCS) 10-Q 14 Mar 24 2024 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jan. 31, 2024	Mar. 14, 2024
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Registrant Name	HEART TEST LABORATORIES, INC.
Entity Central Index Key	0001468492
Current Fiscal Year End Date	--04-30
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity File Number	001-41422
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	26-1344466
Entity Address, Address Line One	550 Reserve Street
Entity Address, Address Line Two	Suite 360
Entity Address, City or Town	Southlake
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76092
City Area Code	682
Local Phone Number	237-7781
Entity Common Stock, Shares Outstanding		65,561,630
Document Quarterly Report	true
Document Transition Report	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	HSCS
Security Exchange Name	NASDAQ
Warrants
Document Information [Line Items]
Title of 12(b) Security	Warrants
Trading Symbol	HSCSW
Security Exchange Name	NASDAQ

Condensed Balance Sheets

Condensed Balance Sheets - USD ($)	Jan. 31, 2024	Apr. 30, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 7,076,497	$ 1,660,467
Accounts receivable	14,700
Inventory	670,278	676,359
Prepaid expenses	233,322	143,460
Other current assets	40,374	40,374
Deferred offering costs	655,579	175,921
Total current assets	8,690,750	2,696,581
Property and equipment, net	58,393	61,428
Intangible assets, net	1,568,818
Right-of-use assets, net	482,743	529,224
TOTAL ASSETS	10,800,704	3,287,233
CURRENT LIABILITIES
Accounts payable	415,076	631,369
Accrued expenses	584,427	623,391
Operating lease liabilities, current	98,319	29,535
Current portion of notes payable	500,000	500,000
Other current liabilities	108,187	48,596
Total current liabilities	1,706,009	1,832,891
LONG-TERM LIABILITIES
Notes payable		500,000
Accrued expenses		187,450
Operating lease liabilities, long-term portion	460,859	536,335
Total long-term liabilities	460,859	1,223,785
TOTAL LIABILITIES	2,166,868	3,056,676
COMMITMENTS AND CONTINGENCIES (NOTE 2, 5, and 8)
STOCKHOLDERS' EQUITY
Common Stock, $0.001 par value, 500,000,000 shares authorized; 63,611,630 shares issued and outstanding as of January 31, 2024 and 10,118,440 shares issued and outstanding as of April 30, 2023.	63,611	10,118
Additional paid-in capital	74,086,087	60,977,256
Accumulated deficit	(65,516,242)	(60,757,198)
TOTAL STOCKHOLDERS' EQUITY	8,633,836	230,557
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	10,800,704	3,287,233
Series A, B and C Convertible Preferred Stock
STOCKHOLDERS' EQUITY
Series A, B, and C convertible preferred stock, $0.001 par value, 20,000,000 shares authorized and 620,000 designated; 380,440 shares issued and outstanding as of January 31, 2024 and 380,871 shares issued and outstanding as of April 30, 2023.	$ 380	$ 381

Condensed Balance (Parenthetica

Condensed Balance (Parenthetical) - $ / shares	Jan. 31, 2024	Apr. 30, 2023
Preferred stock par value	$ 0.001
Preferred stock, shares authorized	20,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares, issued	63,611,630	10,118,440
Common stock, shares outstanding	63,611,630	10,118,440
Series A, B and C Convertible Preferred Stock
Preferred stock par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares designated	620,000	620,000
Preferred stock, shares issued	380,440	380,871
Preferred stock, shares outstanding	380,440	380,871

Condensed Statements of Operati

Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Income Statement [Abstract]
Revenue	$ 14,700	$ 1,950	$ 18,600	$ 5,150
Cost of sales	4,561	760	6,081	2,796
Gross margin	10,139	1,190	12,519	2,354
Operating expenses:
Research and development	509,507	643,258	1,832,442	1,926,432
Selling, general and administrative	1,026,014	667,235	2,606,057	2,590,227
Total operating expenses	1,535,521	1,310,493	4,438,499	4,516,659
Loss from operations	(1,525,382)	(1,309,303)	(4,425,980)	(4,514,305)
Other income (expense)
Interest expense	(118,445)	(32,805)	(333,143)	(209,217)
Other expense		(7)
Other income	16	0	79	1,593
Total other (expense) income	(118,429)	(32,812)	(333,064)	(207,624)
Net loss	$ (1,643,811)	$ (1,342,115)	$ (4,759,044)	$ (4,721,929)
Net loss per share, basic	$ (0.03)	$ (0.16)	$ (0.19)	$ (0.64)
Net loss per share, diluted	$ (0.03)	$ (0.16)	$ (0.19)	$ (0.64)
Weighted average common shares outstanding, basic	53,792,741	8,240,798	25,201,024	7,371,764
Weighted average common shares outstanding, diluted	53,792,741	8,240,798	25,201,024	7,371,764

Condensed Statements of Stockho

Condensed Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($)	Total	IPO	Series C Convertible Preferred Stock	Preferred Stock Series A Convertible Preferred Stock	Preferred Stock Series B Convertible Preferred Stock	Preferred Stock Series C Convertible Preferred Stock	Preferred Stock Series A and B Convertible Preferred Stock	Preferred Stock Total Convertible Preferred Stock	Common Stock	Common Stock IPO	Common Stock Series C Convertible Preferred Stock	Common Stock Series A and B Convertible Preferred Stock	Additional Paid-in Capital	Additional Paid-in Capital IPO	Additional Paid-in Capital Series C Convertible Preferred Stock	Additional Paid-in Capital Series A and B Convertible Preferred Stock	Accumulated Deficit	Non Employee	Non Employee Additional Paid-in Capital	Secured Convertible Promissory Notes	Secured Convertible Promissory Notes Common Stock	Secured Convertible Promissory Notes Additional Paid-in Capital	$1.5M Notes	$1.5M Notes Common Stock	$1.5M Notes Additional Paid-in Capital	Bridge Notes and Accrued Interest	Bridge Notes and Accrued Interest Common Stock	Bridge Notes and Accrued Interest Additional Paid-in Capital
Beginning Balance, Shares at Apr. 30, 2022				10,000	10,000	463,265			3,323,942
Beginning Balance at Apr. 30, 2022	$ (6,055,797)			$ 10	$ 10	$ 463		$ 483	$ 3,323				$ 48,343,305				$ (54,402,908)
Sale of Common Stock and warrants, net of fees, Shares										1,500,000
Sale of Common Stock and warrants, net of fees		$ 5,194,740								$ 1,500				$ 5,193,240
Stock issued upon conversion, Shares				(10,000)	(10,000)	(60,037)					230,086	703,290												909,071			1,544,114
Stock issued upon conversion				$ (10)	$ (10)	$ (60)	$ (20)				$ 231	$ 703			$ (171)	$ (683)							$ 1,500,000	$ 909	$ 1,499,091	$ 3,618,704	$ 1,544	$ 3,617,160
Common Stock issued upon exercise of pre-funded warrants,share									139,356
Common Stock issued upon exercise of pre-funded warrants	14								$ 139				(125)
Warrants issued																		$ 57,203	$ 57,203
Stock based compensation - management & other employees	149,153												149,153
Net loss	(4,721,929)																(4,721,929)
Ending Balance, Shares at Jan. 31, 2023						403,228			8,349,859
Ending Balance at Jan. 31, 2023	(257,912)					$ 403		403	$ 8,349				58,858,173				(59,124,837)
Beginning Balance, Shares at Oct. 31, 2022						403,228			8,210,503
Beginning Balance at Oct. 31, 2022	1,082,676					$ 403		403	$ 8,210				58,856,785				(57,782,722)
Common Stock issued upon exercise of pre-funded warrants,share									139,356
Common Stock issued upon exercise of pre-funded warrants	14								$ 139				(125)
Stock based compensation - management & other employees	1,513												1,513
Net loss	(1,342,115)																(1,342,115)
Ending Balance, Shares at Jan. 31, 2023						403,228			8,349,859
Ending Balance at Jan. 31, 2023	(257,912)					$ 403		403	$ 8,349				58,858,173				(59,124,837)
Beginning Balance, Shares at Apr. 30, 2023						380,871			10,118,440
Beginning Balance at Apr. 30, 2023	$ 230,557					$ 381		381	$ 10,118				60,977,256				(60,757,198)
Sale of Common Stock and warrants, net of fees, Shares	53,493,190								53,493,190	41,746,415											6,781,288
Sale of Common Stock and warrants, net of fees		9,848,831								$ 41,746				9,807,085
Common stock issued for consulting services, Shares									108,696
Common stock issued for consulting services	$ 100,000								$ 109				99,891
Stock issued upon conversion, Shares	1,938		431			(431)			6,366,520		1,938										6,781,288
Stock issued upon conversion						$ (1)		(1)			$ 2				$ (1)					$ 1,022,850	$ 6,781	$ 1,016,069
Issuance of Common Stock for acquired assets, Shares									4,854,853
Issuance of Common Stock for acquired assets	$ 1,528,431								$ 4,855				1,523,576
Warrants issued																		335,633	335,633
Stock based compensation - management & other employees	326,578												326,578
Net loss	(4,759,044)																(4,759,044)
Ending Balance, Shares at Jan. 31, 2024						380,440			63,611,630
Ending Balance at Jan. 31, 2024	8,633,836					$ 380		380	$ 63,611				74,086,087				(65,516,242)
Beginning Balance, Shares at Oct. 31, 2023						380,440			11,213,438
Beginning Balance at Oct. 31, 2023	(1,649,682)					$ 380		380	$ 11,213				62,211,156				(63,872,431)
Sale of Common Stock and warrants, net of fees, Shares										40,762,051
Sale of Common Stock and warrants, net of fees		$ 9,176,937								$ 40,762				$ 9,136,175
Stock issued upon conversion, Shares																					6,781,288
Stock issued upon conversion																				$ 1,022,850	$ 6,781	$ 1,016,069
Issuance of Common Stock for acquired assets, Shares									4,854,853
Issuance of Common Stock for acquired assets	1,528,431								$ 4,855				1,523,576
Warrants issued																		$ 103,019	$ 103,019
Stock based compensation - management & other employees	96,092												96,092
Net loss	(1,643,811)																(1,643,811)
Ending Balance, Shares at Jan. 31, 2024						380,440			63,611,630
Ending Balance at Jan. 31, 2024	$ 8,633,836					$ 380		$ 380	$ 63,611				$ 74,086,087				$ (65,516,242)

Statements of Cash Flows (Unaud

Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Cash flows from operating activities:
Net loss	$ (4,759,044)	$ (4,721,929)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	18,691	20,090
Amortization of debt discounts and deferred financing costs	103,595	61,381
Stock-based compensation	326,578	149,153
Warrants issued to non-employees	335,633
Gain on settled accounts payable		(81,200)
Changes in current assets and liabilities:
Accounts receivable	(14,700)	2,321
Inventory	6,081	(2,770)
Prepaid and other current assets	327,103	270,387
Intangibles	(40,388)
Deferred offering costs	(479,658)	236,353
Accounts payable	(216,293)	427,142
Accrued liabilities	(141,407)	(272,800)
Net cash used in operating activities	(4,533,809)	(3,911,872)
Cash flows from investing activities:
Purchase of property and equipment	(15,656)	(10,716)
Net cash used in investing activities	(15,656)	(10,716)
Cash flows from financing activities:
Issuance of Common Stock in IPO, net of fees		5,194,740
Issuance of warrants in IPO		17,250
Issuance of Common Stock for exercise of pre-funded warrants		14
Issuance of Common Stock, net of fees	9,848,831
Proceeds from shareholder note, net	334,249
Principal repayments of finance lease obligations	(217,585)	(276,724)
Net cash provided by financing activities	9,965,495	4,935,280
Net change in cash and cash equivalents during the period	5,416,030	1,012,692
Cash and cash equivalents, beginning of period	1,660,467	918,260
Cash and cash equivalents, end of period	7,076,497	1,930,952
SUPPLEMENTAL DISCLOSURES OF NON-CASH TRANSACTIONS:
Issuance of Common Stock for $1.5M Note conversions		1,500,000
Issuance of Common Stock for Bridge Note and accrued interest conversions		3,618,704
Issuance of Common Stock for Series A and B Preferred Stock conversions		703
Issuance of common stock for Series C Preferred conversions	2	231
Issuance of Common Stock as consideration for consulting services	100,000
Issuance of Common Stock as consideration for note conversions	1,022,850
Issuance of Common Stock as consideration for acquired intangible assets	1,528,431
Warrants issued as underwriter compensation		39,953
Financed insurance premiums	$ 277,176	445,638
Operating lease assets obtained in exchange for lease obligations		$ 549,227

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jan. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Note 1. Basis of Presentation Heart Test Laboratories, Inc. d/b/a HeartSciences (“HeartSciences” or the “Company”) is a medical technology company specializing in cardiovascular diagnostic technology. The Company is a Texas corporation and is headquartered in Southlake, Texas. HeartSciences’ initial focus is on applying novel technology to extend the clinical indications for use of an electrocardiograph (“ECG”) device. HeartSciences’ first product candidate, the MyoVista, is a resting 12-lead ECG that will incorporate HeartSciences’ first AI-based algorithm that is being developed for use in a wide range of clinical settings and is designed to provide diagnostic information to a qualified healthcare professional on cardiac dysfunction which has traditionally only been provided using cardiac imaging. In addition, the MyoVista provides conventional ECG information. The Company plans to market its device, both domestically and internationally to various hospitals, clinics, and medical centers and manufacture the devices using outsourced production facilities. Additionally, the Company is developing a cloud-based platform to provide access to a range of AI-based ECG cardiovascular algorithms (an “AI-ECG”) on an ECG hardware agnostic basis (the “Cloud Platform”) and, in the future, intends to incorporate additional AI-ECG algorithms in the MyoVista. To date the Company has had small amounts of revenue from key opinion leader engagement and establishment of distributor relationships outside the United States during the development and product improvement phase of the MyoVista. The Company is preparing to seek U.S. Food and Drug Administration (“FDA”) clearance of the MyoVista in calendar year 2024.

Liquidity, Going Concern and Ot

Liquidity, Going Concern and Other Uncertainties	9 Months Ended
	Jan. 31, 2024
Liquidity, Going Concern and Other Uncertainties [Abstract]
Liquidity, Going Concern and Other Uncertainties	Note 2. Liquidity, Going Concern and Other Uncertainties The Company is subject to a number of risks similar to those of early-stage companies, including dependence on key individuals and products, the difficulties inherent in the development of a commercial market, the need to obtain additional capital, competition from larger companies, and other technologies. The Company has incurred losses each year since inception and has experienced negative cash flows from operations in each year since inception. At January 31, 2024 and April 30, 2023, the Company had an accumulated deficit of $ 65.5 million and $ 60.8 million, respectively. These factors raise substantial doubt regarding the Company's ability to continue as a going concern. In March 2023, the Company entered into a purchase agreement and a registration rights agreement with an institutional investor, providing for the sale, from time to time at the discretion of the Company, of up to $ 15.0 million of the Company’s common stock, $ 0.001 par value per shares (“Common Stock”), over the thirty-six ( 36 ) month term of the purchase agreement (the “Equity Line”). As of January 31, 2024, the Company has issued and sold an aggregate 1,864,522 shares of Common Stock, including 100,000 commitment shares, under the Equity Line and received proceeds of approximately $ 1.1 million (see Note 5). Subsequent to January 31, 2024 and through the date of this filing, the Company sold 1.4 million shares of Common Stock under the Equity Line, receiving proceeds of approximately $ 165,000 . In September 2023, the Company entered into an Equity Distribution Agreement (the “EDA” ) with an institutional investor, pursuant to which the Company may offer and sell an aggregate of up to $ 3.25 million of its shares of Common Stock in at-the-market offerings ( “ATM Facility” ). In November 2023, the EDA was further amended increasing the aggregate amount of Common Stock that may be sold under the ATM Facility from $ 3.25 million to up to $ 15.0 million. The Company is eligible to sell up to approximately $ 11.0 million worth of shares of Common Stock as the aggregate market value of the Company's shares of Common Stock eligible for sale under the EDA is subject to limitations of General Instruction I.B.6 of Form S-3 until such time that the Company's public float equals or exceeds $75.0 million. In the event the aggregate market value of the Company’s outstanding Common Stock held by non-affiliates equals or exceeds $ 75.0 million, then the one-third limitation on sales set forth in General Instruction I.B.6 of Form S-3 shall not apply to additional sales made pursuant to the EDA. From inception through January 31, 2024 , the Company has issued and sold an aggregate 40,359,917 shares of Common Stock and received net proceeds of approximately $ 9.2 million, a fter banker fees, legal fees and other costs under the ATM Facility (see Note 5). Subsequent to January 31, 2024 and through the date of this filing, the Company sold 550,000 shares of Common Stock under the ATM Facility, receiving net proceeds of approximately $ 78,000 (see Note 9). Based on the Company’s forecasts and cashflow projections, management believes that current resources would be insufficient to fund operations to achieve commercialization. Additionally, the FDA can delay, limit or deny clearance of a medical device for many reasons outside the Company’s control which may involve substantial unforeseen costs. The Company's continued operations will depend on its ability to raise additional capital through various potential sources, such as equity and/or debt financings and strategic relationships. Management expects no material commercial revenue in Fiscal 2024. Management can provide no assurance that such financing or strategic relationships will be available on acceptable terms, or at all, which would likely have a material adverse effect on the Company and its financial statements. The condensed unaudited financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern for a reasonable period.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Jan. 31, 2024
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 3. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) and in conformity with the instructions on Form 10-Q and Rule 8-03 of Regulation S-X and the related rules and regulations of the U.S. Securities and Exchange Commissions (“SEC”) and have been prepared on a basis which assumes that the Company will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. In the opinion of management, the unaudited interim financial statements reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the balances and results of operations for the periods presented. The interim operating results are not necessarily indicative of results that may be expected for any subsequent period. The accompanying unaudited condensed financial statements should be read in conjunction with the Company's audited financial statements and notes thereto included in the 2023 Annual Report on Form 10-K. Use of Estimates The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. Cash and Cash Equivalents The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The fair value of cash and cash equivalents approximates carrying value. At times, the Company’s cash balances may exceed the current insured amounts under the Federal Deposit Insurance Corporation (“FDIC”). Inventory All inventories are stated at lower of cost or net realizable value, with cost determined substantially on a “first-in, first-out” basis. Selling, general, and administrative expenses are not inventoried, but are charged to expense when incurred. The following is a summary of the Company’s inventories at January 31, 2024 and April 30, 2023: January 31, April 30, 2024 2023 Raw materials $ 322,996 $ 322,996 Sub-assemblies 341,355 347,436 Work in progress 21,741 21,741 Finished goods 28,662 28,662 Reserve for obsolescence ( 44,476 ) ( 44,476 ) Total Inventory $ 670,278 $ 676,359 Inventory consists mainly of raw materials and components used in the current hardware build of the MyoVista. Devices and components are used for research and development purposes and device sales, which to date have been in international markets as sale of the MyoVista in the U.S. is subject to FDA clearance. The Company is partway through a new pivotal clinical validation study and device testing necessary for a revised FDA submission, which is targeted to take place during the first half of calendar year 2024. The Company believes that its hardware platform is in final form, however, prior to FDA clearance and market acceptance of the MyoVista, further hardware changes could be necessary which could have an impact on net realizable values. The majority of the Company’s current inventory is intended for use to build finished products following regulatory clearance. Finished products do not contain materials that would degrade significantly over the useable life of the device and are considered to have a useable life of over seven years . Existing inventory related to finished devices are planned to be updated to the latest hardware revision and specifically allocated to a limited distribution for field reliability studies and are not slated for general purpose sales. The Company periodically evaluates inventory and makes specific write-offs and provides an allowance for inventory that is considered obsolete due to hardware and or software related changes. If the Company does not receive FDA clearance and/or obtain market acceptance of the MyoVista, the Company could have further material write-downs of inventory due to obsolescence in excess of the amount currently reserved. Research and Development Expenses In accordance with ASC Topic 730, Accounting for Research and Development Costs, the Company accounts for research and development expenditures, including payments to collaborative research partners and regulatory filing costs, as research and development expenses. Accordingly, all research and development costs are charged to expense as incurred. Property and Equipment Property and equipment are recorded at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives. The range of estimated useful lives used to calculate depreciation is generally 3 to 5 years. Ordinary maintenance and repairs are charged to expense as incurred, and replacements and betterments are capitalized. When items are retired or otherwise disposed, the related cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in other income (expense). The following is a summary of the Company’s property and equipment at January 31, 2024 and April 30, 2023: January 31, April 30, 2024 2023 Equipment $ 413,576 $ 397,920 Furniture & fixtures 102,563 102,563 Leasehold improvements 32,812 32,812 Total 548,951 533,295 Less: Accumulated depreciation ( 490,558 ) ( 471,867 ) Property and equipment, net $ 58,393 $ 61,428 Deferred Offering Costs The Company capitalizes certain legal, professional, and other-third party charges, related to capital raises through a sale of Common Stock in its IPO or other ongoing equity financings, as deferred offering costs until fully consummated. On October 16, 2023, the Company filed a registration statement on Form S-1, as amended, which has not yet been declared effective by the SEC. These costs are deferred until the completion of the offerings at which time they are reclassified to additional paid-in-capital as a reduction of the offering proceeds. If the Company terminates the planned offering or there is a significant delay, all of the deferred offering costs will be written off to operating expenses. In March, 2023, the Company entered into the Equity Line. Deferred offering costs associated with the Equity Line are reclassified to additional paid in capital on a pro-rata basis over the term of the agreement. In September 2023, the Company entered into an EDA to sell its Common Stock under the ATM Facility. Deferred offering costs associated with the ATM Facility are reclassified to additional paid in capital on a pro-rata basis. As of January 31, 2024 and April 30, 2023, $ 655,579 and $ 175,921 of deferred offering costs were capitalized on the balance sheet, respectively. Fair Value Measurements The accounting guidance establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset transaction between market participants on the measurement date. Where available, fair value is based on observable market prices or is derived from such prices. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: • Level 1 – Observable inputs such as quoted prices in active markets; • Level 2 – Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; • Level 3 – Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the assignment of an asset or liability within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. The carrying amounts of the Company’s financial instruments, which primarily include cash and cash equivalents, accounts payable and accrued expenses, approximate their fair values due to their short-term nature. The carrying amounts of the Company’s existing notes payable approximate their fair values at the stated interest rates and are reflective of the prevailing market rates. Long-Lived Assets Long-lived assets, such as equipment and intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If circumstances require a long-lived asset or asset group be tested for possible impairment, the Company first compares undiscounted cash flows expected to be generated by that asset or asset group to its carrying amount. If the carrying amount of the long-lived asset or asset group is determined to not be recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent the carrying amount exceeds its fair value. Leases The Company determines if a contract is or contains a lease at inception or modification of a contract. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both (a) the right to obtain substantially all of the economic benefits from the use of the asset and (b) the right to direct the use of the asset. Right-of-use assets and liabilities are recognized based on the present value of future minimum lease payments over the expected lease term at commencement date. The Company measures and records a right-of-use asset and lease liability based on the discount rate implicit in the lease, if known. In cases where the discount rate implicit in the lease is not known, the Company measures the right-of-use assets and lease liabilities using a discount rate equal to the Company’s estimated incremental borrowing rate for loans with similar collateral and duration. The Company elected to not apply the recognition requirements to leases of all classes of underlying assets that, at the commencement date, have a lease term of 12 months or less and do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise. Instead, lease payments for such short-term leases are recognized in operations on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred. Stock-Based Compensation The Company accounts for employee and non-employee share-based compensation in accordance with the provisions of ASC 718, Compensation – Stock Compensation . Under ASC 718, share-based compensation cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the requisite service period (generally the vesting period of the equity grant). The estimated fair value of Common Stock option awards is calculated using the Black-Scholes option pricing model, based on key assumptions such as fair value of Common Stock, expected volatility, and expected term. These estimates require the input of subjective assumptions, including (i) the expected stock price volatility, (ii) the calculation of the expected term of the award, (iii) the risk-free rate and (iv) expected dividend yields. As there has not been a historic public market for the Company’s Common Stock, management has determined the expected stock price volatility at the time of grant of the option by considering a number of objective and subjective factors, including stock price volatility of comparable companies that are publicly available and based on the industry, stage of life cycle, size and financial leverage of such other comparable companies. Management has estimated the expected term of its Common Stock options using the “simplified” method, whereby, the expected term equals the arithmetic average of the vesting term and the original contractual term of the option due to its lack of sufficient historical data. The risk-free interest rates for periods within the expected term of the option are based on the US Treasury securities with a maturity date that commensurate with the expected term of the associated award. There is no expected dividend yield since the Company has never paid cash dividends and does not expect to pay cash dividends in the foreseeable future. For stock options issued to employees and non-employees where vesting is contingent upon a service period, the fair value of stock-based awards is recognized as compensation expense over the requisite service period, which is defined as the period during which an employee is required to provide service in exchange for an award. The Company uses a straight-line attribution method for all grants that include only a service condition. For stock options issued to employees and non-employees were vesting is contingent upon meeting performance criteria, the fair value of the stock-based awards vests when the performance criteria has been met. The Company accounts for forfeitures when they occur. Stock-based compensation expense recognized in the financial statements is reduced by actual awards forfeited. Net Loss Per Common Share Basic net loss per share excludes the effect of dilution and is computed by dividing the net loss attributable to common shareholders by the weighted-average number of shares of Common Stock outstanding during the period, without consideration of potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common shareholders by the weighted-average number of Common Stock and potentially dilutive securities outstanding for the period. For purposes of the diluted net loss per share calculation, convertible preferred stock, stock options, Common Stock subject to repurchase related to early exercise of stock options, convertible stock warrants and convertible notes are considered to be potentially dilutive securities. As the Company has reported a net loss for all periods presented, diluted net loss per common share is the same as basic net loss per common share for those periods. Common Stock Warrants The Company has issued warrants, which allow the warrant holder to purchase one share of stock at a specified price for a specified period of time. The Company records equity instruments including warrants based on the fair value at the date of issue. The fair value of warrants classified as equity instruments at the date of issuance is estimated using the Black-Scholes model and is recorded to additional paid-in-capital. Revenue Recognition In accordance with ASC 606, Revenue from Contracts with Customers, revenue is recognized when a customer obtains control of promised goods or services. The guidance focuses on the core principle for revenue recognition, which is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company recognizes revenue in accordance with ASC 606, which provides a five-step model for recognizing revenue from contracts with customers as follows: • Step 1: Identify the contract(s) with a customer • Step 2: Identify the performance obligations in the contract • Step 3: Determine the transaction price • Step 4: Allocate the transaction price to the performance obligations in the contract • Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation A contract with a customer exists when (i) the Company enters into a legally enforceable contract with a customer, through a purchase order, that defines each party’s rights regarding the products to be transferred and identifies the payment terms related to these products, (ii) the contract has commercial substance and, (iii) the Company determines that collection of substantially all consideration for products that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The only performance obligation is to create and ship the product and each product has separate, distinct pricing. Performance obligations are met and revenue is recognized at a point in time when the order for its goods are shipped FOB manufacturer and control is transferred. The transaction price is determined based on the amount expected to be entitled to in exchange for transferring the product to the customer net of any transaction price adjustments. The Company’s payment terms to customers generally range from 30 to 60 days. Payment terms fall within the one-year guidance for the practical expedient which allows the Company to forgo adjustment of the promised amount of consideration for the effects of a significant financing component. The Company accepts product returns at its discretion or if the product is defective as manufactured. Historically, the actual product returns have been immaterial to the Company’s financial statements. The Company elected to treat shipping and handling costs as a fulfillment cost and included them in the cost of goods sold as incurred. Costs associated with product sales include commissions. The Company applies the practical expedient and recognizes commissions as expense when incurred because the expense is incurred at a point in time and the amortization period is less than one year. Commissions are recorded as selling expense. The Company did not recognize material revenues during the three and nine month periods ended January 31, 2024 and 2023. The Company’s revenues do not require significant estimates or judgments. The Company is not a party to contracts that include multiple performance obligations or material variable consideration. As of January 31, 2024 and April 30, 2023, the Company did no t have any contract assets or liabilities from contracts with customers and there were no remaining performance obligations that the Company had not satisfied. Income Taxes The Company accounts for income taxes under the asset and liability method, which requires recognition of deferred tax assets, subject to valuation allowances, and liabilities for the expected future tax consequences of events that have been included in the financial statements or tax returns. Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting and income tax purposes. Management considers many factors when assessing the likelihood of future realization of deferred tax assets, including recent cumulative experience by taxing jurisdiction, expectations of future taxable income or loss, the carry-forward periods available to the Company for tax reporting purposes, and other relevant factors. A valuation allowance is established if it is more likely than not that all or a portion of the net deferred tax assets will not be realized. Accruals for uncertain tax positions are provided for in accordance with applicable accounting standards. The Company may recognize the tax benefits from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Judgment is required in assessing the future tax consequences of events that have been recognized in the financial statements or tax returns. Based on its analysis, management has determined that it has not incurred any liability for unrecognized tax benefits as of January 31, 2024 and April 30, 2023. The Company may be subject to potential examination by U.S. federal, U.S. states or foreign jurisdiction authorities in the areas of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income among various tax jurisdictions and compliance with U.S. federal, U.S. state and foreign tax laws. The Company is subject to income taxes in the U.S. federal jurisdiction and franchise taxes in the State of Texas. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. Generally, the Company is no longer subject to income tax examinations by major taxing authorities for years before 2018.

Debt

Debt	9 Months Ended
	Jan. 31, 2024
Debt Disclosure [Abstract]
Debt	Note 4. Debt Debt consists of the following: January 31, April 30, 2024 2023 $1M Notes $ 500,000 $ 1,000,000 Less: current maturities ( 500,000 ) ( 500,000 ) Notes payable, long-term $ — $ 500,000 $1M Notes and Loan and Security Agreement In April 2020, the Company entered into a loan and security agreement (the “$1M Loan and Security Agreement”) pursuant to which a secured promissory note in the original principal amount of $ 500,000 (the “FRV Note”) was issued to each of Front Range Ventures LLC (“FRV”) and John Q. Adams (the “JQA Note”), who were both shareholders of the Company at the time of issuance. John Q. Adams was also a director of the Company at the time of entering into the $1M Loan and Security Agreement. Each party committed to lend a principal amount of $ 500,000 , totaling $ 1,000,000 , and the loan was drawn in three installments of $ 300,000 upon execution of the loan agreement, $ 350,000 on or about July 2, 2020 and $ 350,000 on or about September 4, 2020. The loan accrued interest at a rate of 12 % per annum, compounded annually, payable at maturity. The Company is also required to pay default interest at a rate of 18 % per annum, compounded annually, on any unpaid amounts after the applicable due date until the loan amounts are fully re-paid. The loan is collateralized by substantially all of the Company’s assets and intellectual property, except for the secured interest on the covered technology as discussed in Note 8. The loan had an original maturity date of September 30, 2021 , which was amended in September 2021 making the note repayable on demand. The loan was amended in November 2021, extending the maturity to September 30, 2022 ; further amended in May 2022 to extend the maturity to September 30, 2023 ; amended again in January 2023 to (i) further extend the maturity date of the FRV Note to September 30, 2024 , on which date the principal amount and all accrued interest thereon would be due and payable; and (ii) amend the dates on which principal and accrued interest was due under the JQA Note, such that interest accrued since June 28, 2022 would be due and payable on September 30, 2023 , and the principal amount together with all accrued interest after September 30, 2023 would be due and payable on March 31, 2024 . In connection with the amendment in May 2022, the Company agreed to pay Mr. Adams all accrued but unpaid interest on his note prior to September 30, 2022. In June 2022, the Company paid approximately $ 126,000 in accrued interest to Mr. Adams. In October 2023, the Company issued to FRV and Mr. Adams warrants (“$1M Lender Warrants” ) to purchase an aggregate of 200,000 shares of Common Stock as consideration for the extension of the interest maturity date to one lender. On November 16, 2023, the Company entered into a note conversion letter agreement with John Q. Adams (the “Adams Note Conversion Letter Agreement”). Pursuant to the Adams Note Conversion Letter Agreement, in consideration for the conversion of the principal and interest in the amounts of $ 585,006 due under the JQA Note, on November 16, 2023, the Company: (1) issued 3,656,288 shares of Common Stock to Mr. Adams; and (2) entered into a Adams Warrant Amendment (as defined below) with Mr. Adams, amending the $1M Lender Warrants to reduce the exercise price of an aggregate of 107,575 $1M Lender Warrants to $ 0.16 per share (the “Adams Warrant Amendment”). See further discussion in Note 5. As of January 31, 2024 and April 30, 2023, accrued interest was approximately $ 248,000 and $ 238,000 , respectively, and is included in accrued expenses in the accompanying condensed balance sheets. MSW Note On September 6, 2023, the Company entered into a Senior Unsecured Promissory Drawdown Loan Note (the “MSW Note”) with Matthews Holdings Southwest, Inc., (“MSW”). The MSW Note provided for an unsecured drawdown loan of up to $ 1.0 million, drawn in installments consisting of (i) $ 250,000 on or prior to September 8, 2023, (ii) $ 250,000 on or prior to September 20, 2023, and (iii) further drawdowns of up to $ 500,000 in such amounts and such times to be mutually agreed upon between the Company and MSW. In September 2023, the Company drew $ 0.5 million under the MSW Note and issued warrants in lieu of a facility fee to purchase 500,000 shares of Common Stock exercisable at $ 1.00 per share, warrants to purchase 250,000 shares of Common Stock exercisable at $ 1.25 per share, and warrants to purchase 250,000 shares of Common Stock exercisable at $ 1.50 per share. On November 16, 2023, the Company entered into a note conversion letter agreement with the MSW (the “MSW Note Conversion Letter Agreement”). Pursuant to the MSW Note Conversion Letter Agreement, in consideration for the conversion of the aggregate amount of $ 500,000 due under the MSW Note, on November 16, 2023, the Company (i) issued to MSW 3,125,000 shares of Common Stock at a conversion price of $ 0.16 per share; and (ii) entered into a MSW Warrant Amendment with MSW, amending the warrants to reduce the exercise price of an aggregate of 1,000,000 warrants to $ 0.16 per share (the “MSW Warrant Amendment”). See further discussion in Note 5. In accordance with the terms, no interest was payable as the note converted prior to maturity.

Stockholders' Equity (Deficit)

Stockholders' Equity (Deficit)	9 Months Ended
	Jan. 31, 2024
Equity [Abstract]
Stockholders' Equity (Deficit)	Note 5. Stockholders’ (Deficit) Equity Preferred Stock The Company authorized 20,000,000 shares of preferred stock, par value $ 0.001 per share (“Preferred Stock”), of which 10,000 shares have been designated as Series A Convertible Preferred Stock (“Series A Preferred Stock”), 10,000 shares have been designated as Series B Convertible Preferred Stock (“Series B Preferred Stock”), and 600,000 shares have been designated as Series C Preferred Stock with a liquidation preference to Common Stock. Series C Preferred Stock The Series C Preferred Stock was originally issued at $ 25.00 per share. An amendment to, or waiver of rights in, the Series C Preferred Stock certificate of designation requires the approval of holders of a majority of the outstanding shares of Series C Preferred Stock and FRV (so long as FRV owns at least 71,000 shares of Series C Preferred Stock). At January 31, 2024 and April 30, 2023, there were 380,440 and 380,871 shares of Series C Preferred Stock outstanding, respectively. Holders of the Series C Preferred Stock are entitled to receive dividends at an annual rate of $ 1.50 per share of Series C Preferred Stock, shall accrue and are payable out of funds legally available, are payable only when and if declared by the board of directors, and are noncumulative. No dividends have been declared to date. The holders of the shares of Series C Preferred Stock have voting rights equal to an equivalent number of shares of Common Stock into which it is convertible and vote together as one class with Common Stock. Each share of Series C Preferred Stock is convertible, at the option of the holder at any time, into such number of fully paid and non-assessable shares of Common Stock determined by dividing the original issue price of $ 25.00 by the conversion price for such series in effect at the time of conversion for the Series C Preferred Stock. The conversion price for the Series C Preferred Stock is subject to adjustment in accordance with conversion provisions contained in the Company's certificate of formation, as amended. During the nine months ended January 31, 2024, 431 shares of Series C Preferred Stock converted into 1,938 shares of Common Stock at a conversion ratio of 4.4981 shares of Common Stock for each share of Series C Preferred Stock. At January 31, 2024, the Series C Preferred Stock were convertible into 6,366,520 shares of Common Stock at a conversion price of $ 1.49 per share. At March 14, 2024, the outstanding shares of Series C Preferred Stock were convertible into 6,513,456 shares of Common Stock at a c onversion price of $ 1.46 per share. Common Stock The Company’s Certificate of Formation, as amended, authorizes 500,000,000 shares of Common Stock with a par value of $ 0.001 per share. As of January 31, 2024 and April 30, 2023, the Company had issue d 63,611,630 a nd 10,118,440 shares of Common Stock, respectively. During the nine months ended January 31, 2024, the Company issued 53,493,190 shares of Common Stock, as set forth in the below table: Number of Shares Issuance of Common Stock under Equity Line 1,386,498 Issuance of Common Stock under ATM Facility 40,359,917 Issuance of Common Stock for note conversions 6,781,288 Issuance of Common Stock pursuant to MTS Transaction (see Note 8) 4,854,853 Issuance of Common Stock as payment for consulting services rendered 108,696 Conversion of Series C Preferred Stock to Common Stock 1,938 Common Stock issued during the nine months ended January 31, 2024 53,493,190 Summary table of Common Stock share transactions: Balance at April 30, 2023 10,118,440 Issued in Fiscal 2024 53,493,190 Balance at January 31, 2024 63,611,630 On March 10, 2023, the Company entered into a purchase agreement with Lincoln Park Capital Fund, LLC (“Lincoln Park”) providing for the purchase, from time to time at the Company’s discretion, of up to $ 15.0 million of the Company’s Common Stock, over the thirty-six ( 36 ) month term of the purchase agreement. The agreement allows the Company, at its sole discretion, to direct Lincoln Park to purchase shares of Common Stock, subject to limitations in both volume and dollar amount. The purchase price of the shares that may be sold to Lincoln Park under the agreement is the lower of (i) the lowest sale price on the date of purchase, or (ii) the average of the three lowest closing prices in the prior ten business days. Concurrently with the purchase agreement, the Company entered into a registration rights agreement, pursuant to which the Company filed a registration statement on Form S-1 with the SEC on March 22, 2023 . The registration statement was declared effective by the SEC on April 10, 2023 . During the nine months ended January 31, 2024, the Company issued 1,386,498 shares of Common Stock to Lincoln Park receiving approximately $ 0.7 million in proceeds. On September 18, 2023, the Company entered into an EDA with Maxim Group LLC as sales agent pursuant to which the Company may offer and sell up to $ 3.25 million shares of Common Stock under the ATM Facility. The shares may be issued and sold from time to time through or to the placement agent acting as sales agent or principal pursuant to our shelf registration statement on Form S-3 (the “Shelf S-3”), as filed with the SEC on September 18, 2023. The $ 3.25 million shares comprised of Common Stock that may be offered, issued and sold under the at-the-market offering prospectus is included in the $ 50.0 million of securities that may be offered, issued, and sold by the Company under the base prospectus of the Shelf S-3. The Shelf S-3 was declared effective by the SEC on September 28, 2023. On November 9, 2023, the Company entered into Amendment No. 1 to the EDA with Maxim, pursuant to which the Company may sell up to $ 10.0 million shares of Common Stock from time to time through the sales agent. On November 17, 2023, the Company entered into Amendment No. 2 to the EDA with Maxim, pursuant to which the Company may sell up to $ 15.0 million shares of Common Stock from time to time through the sales agent. During the nine months ended January 31, 2024, the Company issued 40,359,917 shares of Common Stock under the ATM Facility, receiving net proceeds of approximately $ 9.2 million after Maxim fees, legal fees and other costs. During the nine months ended January 31, 2024, the Company issued 108,696 shares of Common Stock as consideration for consulting services. During the nine months ended January 31, 2024, the Company issued 6,781,288 shares of Common Stock as consideration for the conversion of the MSW Note and the JQA Note (see Note 4). In November 2023, the Company issued 4,854,853 shares of Common Stock as consideration for certain license agreements with Icahn School of Medicine at Mount Sinai (“Mount Sinai”) (see Note 8). The holders of Common Stock are entitled to receive dividends whenever funds and assets are legally available and when declared by the board of directors, subject to the rights of holders of Preferred Stock outstanding. No dividends were declared as of or through the nine months ended January 31, 2024 and the year ended April 30, 2023. Common Stock Warrants The Company has issued warrants to investors in connection with funding or for services rendered and these warrants are convertible into a number of shares of the Company’s Common Stock for a period of 5 years from the date of issuance. The following is a summary of warrant activity during the nine months ended January 31, 2024: Warrants Exercise Price Weighted Average Strike Price per Share Balance, April 30, 2023 2,590,342 $ 0.00001 -$ 15.18 $ 3.73 Issued 3,079,753 $ 0.00001 -$ 0.73 $ 0.24 Cancelled ( 16,314 ) $ 3.47 -$ 15.18 - Balance, January 31, 2024 5,653,781 $ 0.00001 -$ 8.25 $ 1.82 In September 2023, the Company issued warrants in lieu of a facility fee under the MSW Note to purchase 500,000 shares of Common Stock exercisable at $ 1.00 per share, warrants to purchase 250,000 shares of Common Stock exercisable at $ 1.25 per share, and warrants to purchase 250,000 shares of Common Stock exercisable at $ 1.50 per share. On November 16, 2023, pursuant to the MSW Warrant Amendment, the exercise price of the warrants were reduced to $ 0.16 per share. See further discussion in Note 4. In September 2023, the Company issued warrants to purchase up to 15,000 shares of Common Stock, at an exercise price of $ 0.73 per share, to a consultant of the Company as consideration for services rendered to the Company. In October 2023, the Company issued $ 1 M Lender Warrants to FRV and John Q. Adams to purchase an aggregate of 200,000 shares of Common Stock at an exercise price of $ 0.44 . On November 16, 2023, pursuant to the Adams Warrant Amendment, the exercise price of the warrants issued to Mr. Adams were reduced to $ 0.16 per share. See further discussion in Note 4. In November 2023, the Company issued warrants to purchase up to 240,000 shares of Common Stock, at an exercise price of $ 0.17 per share, to consultants of the Company as consideration for services rendered to the Company. In November 2023, the Company issued pre-funded warrants to purchase up to 710,605 shares o f Common Stock, with an exercise price per share of $ 0.00001 and warrants to purchase up to 914,148 shares of Common Stock, having an exercise price per share equal to $ 0.5060 to Mount Sinai. See further discussion in Note 8.

Stock-based Compensation

Stock-based Compensation	9 Months Ended
	Jan. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock-based Compensation	Note 6. Stock-based Compensation The Company grants certain employees and board members stock option awards where vesting is contingent upon a service period, as it believes that such awards better align the interests of its employees with those of its shareholders. Stock option awards are granted with an exercise price equal to or above the market price of the Company’s stock at the date of grant. Certain stock option awards provide for accelerated vesting if there is a change in control, as defined in the Nonstatutory Stock Option Agreement. Unvested stock options forfeit when an employee leaves the Company. Time-based grants generally vest quarterly based on 3 years continuous service for executive directors and employees, or 12 months continuous service for directors and have 10-year contractual terms. The Company also grants stock option awards where vesting is contingent upon meeting various departmental and company-wide performance goals, including FDA and CE Mark regulatory approval and certain EBITDA and funding thresholds. Such performance-based stock options are expected to vest when the performance criteria and metrics have been met. These stock options have contractual lives of ten years . 2023 Equity Incentive Plan On March 15, 2023, the Company's Board of Directors adopted the 2023 Equity Incentive Plan (as amended, the “Equity Incentive Plan”), subject to shareholder approval. The Equity Incentive Plan provides for the grant of nonstatutory stock options, incentive stock options, restricted stock, restricted stock units, performance units, performance shares, and other share-based awards. Pursuant to the Equity Incentive Plan, the Company is authorized to issue up to 2,500,000 shares of Common Stock plus (i) any shares of our Common Stock subject to options that expire or otherwise terminate without having been exercised in full, are tendered to or withheld by us for payment of an exercise price or for tax withholding obligations, or are forfeited to or repurchased by us due to failure to vest, with the maximum number of shares of Common Stock to be added to the Equity Incentive Plan under this clause (ii) equal to 832,195 shares of Common Stock. On November 27, 2023, the Company's Board of Directors approved and entered into Amendment No. 1 to the Equity Incentive Plan, subject to shareholder approval, to increase the initial number of shares currently issuable under the Plan from 2,500,000 shares to 8,500,000 shares. The Company's shareholders approved the Equity Incentive Plan at the annual shareholder meeting held on January 17, 2024. In January 2024, the Company granted 150,000 stock options to a board advisor of the Company. The stock options, which have an exercise price of $ 0.13 , will expire in January 2034 and vest on a quarterly basis beginning March 2024. There were no stock options granted during the nine month period ended January 31, 2023. The following is a summary of service-based stock option activity during the nine months ended January 31, 2024: Number of Weighted Average Outstanding - April 30, 2023 1,182,912 $ 3.29 8.6 Granted 150,000 0.13 10.0 Options forfeited ( 114,545 ) 13.11 — Outstanding - January 31, 2024 1,218,367 $ 1.98 8.6 Non-vested at January 31, 2024 970,326 $ 0.84 9.3 Vested at January 31, 2024 248,041 $ 6.41 5.8 The following is a summary of performance-based stock option activity during the nine months ended January 31, 2024: Number of Weighted Average Outstanding - April 30, 2023 578,207 $ 5.17 7.8 Options forfeited ( 11,667 ) 12.21 — Outstanding - January 31, 2024 566,540 $ 5.03 6.2 Non-vested at January 31, 2024 377,588 $ 6.21 6.0 Vested at January 31, 2024 188,952 $ 2.67 6.5 Management estimates the fair values of stock options using the Black-Scholes option-pricing model on the date of grant. For the nine months ended January 31, 2024, the assumptions used in the Black-Scholes option pricing model, which was used to estimate the grant date fair value per option, was as follows: Risk free interest rate 4.1 % Volatility 85.8 % Dividend yield — Expected term (years) 5.0 During the nine months ended January 31, 2024 and 2023, the Company recognized stock based compensation for stock options of $ 326,578 and $ 149,153 , respectively. As of January 31, 2024, there was approximatel y $ 0.2 million of unrecognized compensation costs related to non-vested service-based Common Stock options and approximat ely $ 1.6 million of unrecognized compensation costs related to non-vested performance-based Common Stock options.

Income Taxes

Income Taxes	9 Months Ended
	Jan. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Note 7. Income Taxes The tax effects of temporary differences and carry-forwards that give rise to significant portions of the deferred tax assets and liabilities are presented below: January 31, April 30, 2024 2023 Deferred tax assets (liabilities): Net operating loss carryforwards $ 10,965,829 $ 9,701,650 Start-up costs 859,188 934,999 Stock option and warrant payments 677,732 538,669 Accumulated depreciation ( 3,282 ) ( 3,111 ) Research and development credits 255,600 255,600 Research and development warrants 21,488 21,488 Total deferred tax assets, net 12,776,555 11,449,295 Valuation Allowance ( 12,776,555 ) ( 11,449,295 ) Net Deferred Tax Assets $ — $ — For the nine months ended January 31, 2024 and the year ended April 30, 2023, the Company’s cumulative net operating loss for federal income tax purposes was approximately $ 52 million and $ 46 million , respectively. The net operating loss, subject to limitations, may be available in future tax years to offset taxable income. The net operating loss carry-forward will begin to expire in year 2028 . Federal and state tax laws impose restrictions on the utilization of net operating loss carryforwards in the event of a change in ownership as defined by the Internal Revenue Code (the "Code"), Section 382. Under Section 382 of the Code, substantial changes in ownership and the ownership of acquired companies may limit the amount of net operating loss carryforwards that are available to offset taxable income. The annual limitation would not automatically result in the loss of net operating loss carryforwards but may limit the amount available in any given future period. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Based upon the projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that the Company will not realize the benefits of these deductible differences, and therefore, a full valuation allowance has been recorded at January 31, 2024 and April 30, 2023.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jan. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 8. Commitments and Contingencies Operating Leases The Company has a long-term operating lease for office, industrial, and laboratory space which was entered into in May 2017. On September 27, 2022, the Company entered into the First Amendment to Lease (the “Lease Amendment”), which amended the Lease Agreement to document the exercise of its option to extend the term of the lease for an additional 64 months , commencing February 1, 2023 , and expiring on May 31, 2028 (the “Extension Term”). Pursuant to the amendment, the Company will pay initial monthly payments of $ 13,129 , beginning February 2023, subject to 3 % annual increases. Rent expense for the nine months ended January 31, 2024 wa s approximately $ 111,000 . The Company records right-of-use assets and liabilities at the present value of the fixed lease payments over the term at the commencement date. The Company uses its incremental borrowing rate of 12 % to determine the present value of the lease as the rate implicit in the lease is typically not readily available. Information related to the Company’s right-of-use assets and lease liabilities consist of the following: January 31, 2024 Right-of-use assets $ 482,743 Lease liabilities, current 98,319 Lease liabilities, net of current portion 460,859 Total lease liabilities $ 559,178 Weighted average remaining term (in years) 4.3 Weighted average discount rate 12 % As of January 31, 2024, future maturities of lease liabilities due under lease agreements for the fiscal year ended are as follows: April 30, 2024 $ 39,389 April 30, 2025 161,167 April 30, 2026 165,190 April 30, 2027 169,307 April 30, 2028 173,559 Thereafter 14,493 Subtotal 723,105 Less imputed interest ( 163,927 ) Total operating lease liabilities $ 559,178 Litigation From time to time, the Company may be subject to legal proceedings and claims that arise in the ordinary course of business. The Company does not believe that the outcome of those matters will have a material adverse effect to the financial position, operating results or cash flows. However, there can be no assurance such legal proceedings will not have a material impact. The Company is not aware of any material claims outstanding or pending against the Company as of January 31, 2024. Royalty Agreements In 2013, the Company entered into an agreement (“Technology Agreement”) with its founder, conveying ownership of all intellectual property and rights to the Company. As part of that agreement, the Company will make royalty payments, based upon paid MyoVista device unit sales, as follows: a) $ 500 on each of the first 2,400 MyoVista devices; and b) $ 200 on each MyoVista device thereafter until royalties total $ 3,500,000 . The royalty obligation has a first priority security interest and pledge on the covered technology (as defined in the Technology Agreement, which essentially is comprised of the intellectual property of the MyoVista device) in priority to the debt holders of the $ 1.5 M Notes and $ 1 M Loan and Security Agreement as discussed further in Note 4. Upon (i) the aggregate payment of $ 3,000,000 of royalties; (ii) the Common Stock having a closing quoted share price of $ 68.75 per share or more; or (iii) receipt by the Company of a bona fide offer valuing the Common Stock at $ 68.75 or more, then the secured interest and pledge shall be released. In the event of a bankruptcy of the Company, any balance of the $ 3,500,000 royalty not paid at that point would accelerate and become an immediately due debt obligation of the Company with the benefit of the secured interest and pledge (if it remained at such time). In December 2015, the Company entered into an agreement with The University Court of The University of Glasgow (“Glasgow”) for a non-exclusive license of the Glasgow algorithm interpretive analysis for the conventional ECG trace. The agreement was amended in March 2023, and as part of the agreement, the Company is required to make royalty payments, based upon MyoVista device unit sales dependent on sale volumes per year, subject to minimum annual fees. To date, such amounts have been expensed to research and development as the Glasgow algorithm has been part of the device development and will form part of the submission for FDA clearance of the MyoVista device. Collaboration Agreements Rutgers Collaboration Agreement On November 29, 2022, the Company entered into a multi-year Collaboration Agreement with Rutgers, The State University of New Jersey, to develop AI-ECG algorithms for new or improved ECG indications. Mount Sinai Collaboration Agreement On September 20, 2023, the Company entered into multiple definitive license agreements (each a “License Agreement” and collectively, the “License Agreements”) with Mount Sinai to commercialize a range of AI cardiovascular algorithms developed by Mount Sinai as well as a memorandum of understanding for ongoing cooperation encompassing de-identified data access, on-going research, and the evaluation of the MyoVista. The License Agreements, of which there are eleven in total, cover rights to thirteen AI cardiovascular algorithms, two data science methods for use with ECG waveforms and three filed patents. On November 15, 2023, we closed the transactions contemplated under the Mount Sinai Securities Purchase Agreement and the licenses under the License Agreements, which became effective on that date. On November 16, 2023 and pursuant to the Mount Sinai Securities Purchase Agreement, we issued to Mount Sinai the following: • 4,854,853 shares of Common Stock (the “Consideration Shares”); • pre-funded warrants to purchase up to 710,605 shares of Common Stock, with an exercise price per share of $ 0.00001 , which warrants were issued in lieu of shares of Common Stock issuable to Mount Sinai to ensure that the number of shares of Common Stock held by Mount Sinai does not exceed the Beneficial Ownership Limitation (the “MTS Pre-Funded Warrants”); and • Common stock warrants to purchase up to 914,148 shares of Common Stock, having an exercise price per share equal to $ 0.5060 , (the “MTS Warrants” and collectively with the Consideration Shares and the MTS Pre-Funded Warrants, the “MTS Securities”). On December 1, 2023, the Company satisfied all material closing conditions of the Mount Sinai Securities Purchase Agreement and the MTS Warrants thereafter became fully exercisable by Mount Sinai. Registration rights related to the MTS Securities provide that on or prior to the date of one hundred and fifty days ( 150 ) days after the closing date, the Company shall prepare and file with the SEC a Registration Statement on Form S-1 (or such other form as applicable) covering the resale under the Securities Act of the MTS Securities issued to Mount Sinai, subject to any limitations imposed by the Nasdaq Rules. On March 5, 2024, the Company filed with the SEC a Registration Statement on Form S-1 registering the resale of the MTS Securities issued to Mount Sinai and the Registration Statement on Form S-1 was declared effective on March 13, 2024.

Subsequent Events

Subsequent Events	9 Months Ended
	Jan. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	Note 9. Subsequent Events Management has evaluated subsequent events after the balance sheet date of January 31, 2024, through the date of filing. During February 2024, the Company sold 1.4 million shares of Common Stock under the Equity Line, receiving proceeds of approximately $ 165,000 . During February 2024, the Company sold 550,000 shares of Common Stock under the ATM Facility, received net proceeds of approximately $ 78,000 .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Jan. 31, 2024
Summary of Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) and in conformity with the instructions on Form 10-Q and Rule 8-03 of Regulation S-X and the related rules and regulations of the U.S. Securities and Exchange Commissions (“SEC”) and have been prepared on a basis which assumes that the Company will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. In the opinion of management, the unaudited interim financial statements reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the balances and results of operations for the periods presented. The interim operating results are not necessarily indicative of results that may be expected for any subsequent period. The accompanying unaudited condensed financial statements should be read in conjunction with the Company's audited financial statements and notes thereto included in the 2023 Annual Report on Form 10-K.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The fair value of cash and cash equivalents approximates carrying value. At times, the Company’s cash balances may exceed the current insured amounts under the Federal Deposit Insurance Corporation (“FDIC”).
Inventory	Inventory All inventories are stated at lower of cost or net realizable value, with cost determined substantially on a “first-in, first-out” basis. Selling, general, and administrative expenses are not inventoried, but are charged to expense when incurred. The following is a summary of the Company’s inventories at January 31, 2024 and April 30, 2023: January 31, April 30, 2024 2023 Raw materials $ 322,996 $ 322,996 Sub-assemblies 341,355 347,436 Work in progress 21,741 21,741 Finished goods 28,662 28,662 Reserve for obsolescence ( 44,476 ) ( 44,476 ) Total Inventory $ 670,278 $ 676,359 Inventory consists mainly of raw materials and components used in the current hardware build of the MyoVista. Devices and components are used for research and development purposes and device sales, which to date have been in international markets as sale of the MyoVista in the U.S. is subject to FDA clearance. The Company is partway through a new pivotal clinical validation study and device testing necessary for a revised FDA submission, which is targeted to take place during the first half of calendar year 2024. The Company believes that its hardware platform is in final form, however, prior to FDA clearance and market acceptance of the MyoVista, further hardware changes could be necessary which could have an impact on net realizable values. The majority of the Company’s current inventory is intended for use to build finished products following regulatory clearance. Finished products do not contain materials that would degrade significantly over the useable life of the device and are considered to have a useable life of over seven years . Existing inventory related to finished devices are planned to be updated to the latest hardware revision and specifically allocated to a limited distribution for field reliability studies and are not slated for general purpose sales. The Company periodically evaluates inventory and makes specific write-offs and provides an allowance for inventory that is considered obsolete due to hardware and or software related changes. If the Company does not receive FDA clearance and/or obtain market acceptance of the MyoVista, the Company could have further material write-downs of inventory due to obsolescence in excess of the amount currently reserved.
Research and Development Expenses	Research and Development Expenses In accordance with ASC Topic 730, Accounting for Research and Development Costs, the Company accounts for research and development expenditures, including payments to collaborative research partners and regulatory filing costs, as research and development expenses. Accordingly, all research and development costs are charged to expense as incurred.
Property and Equipment	Property and Equipment Property and equipment are recorded at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives. The range of estimated useful lives used to calculate depreciation is generally 3 to 5 years. Ordinary maintenance and repairs are charged to expense as incurred, and replacements and betterments are capitalized. When items are retired or otherwise disposed, the related cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in other income (expense). The following is a summary of the Company’s property and equipment at January 31, 2024 and April 30, 2023: January 31, April 30, 2024 2023 Equipment $ 413,576 $ 397,920 Furniture & fixtures 102,563 102,563 Leasehold improvements 32,812 32,812 Total 548,951 533,295 Less: Accumulated depreciation ( 490,558 ) ( 471,867 ) Property and equipment, net $ 58,393 $ 61,428
Deferred Offering Costs	Deferred Offering Costs The Company capitalizes certain legal, professional, and other-third party charges, related to capital raises through a sale of Common Stock in its IPO or other ongoing equity financings, as deferred offering costs until fully consummated. On October 16, 2023, the Company filed a registration statement on Form S-1, as amended, which has not yet been declared effective by the SEC. These costs are deferred until the completion of the offerings at which time they are reclassified to additional paid-in-capital as a reduction of the offering proceeds. If the Company terminates the planned offering or there is a significant delay, all of the deferred offering costs will be written off to operating expenses. In March, 2023, the Company entered into the Equity Line. Deferred offering costs associated with the Equity Line are reclassified to additional paid in capital on a pro-rata basis over the term of the agreement. In September 2023, the Company entered into an EDA to sell its Common Stock under the ATM Facility. Deferred offering costs associated with the ATM Facility are reclassified to additional paid in capital on a pro-rata basis. As of January 31, 2024 and April 30, 2023, $ 655,579 and $ 175,921 of deferred offering costs were capitalized on the balance sheet, respectively.
Fair Value Measurements	Fair Value Measurements The accounting guidance establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset transaction between market participants on the measurement date. Where available, fair value is based on observable market prices or is derived from such prices. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: • Level 1 – Observable inputs such as quoted prices in active markets; • Level 2 – Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; • Level 3 – Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the assignment of an asset or liability within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Management’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. The carrying amounts of the Company’s financial instruments, which primarily include cash and cash equivalents, accounts payable and accrued expenses, approximate their fair values due to their short-term nature. The carrying amounts of the Company’s existing notes payable approximate their fair values at the stated interest rates and are reflective of the prevailing market rates.
Long-Lived Assets	Long-Lived Assets Long-lived assets, such as equipment and intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If circumstances require a long-lived asset or asset group be tested for possible impairment, the Company first compares undiscounted cash flows expected to be generated by that asset or asset group to its carrying amount. If the carrying amount of the long-lived asset or asset group is determined to not be recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent the carrying amount exceeds its fair value.
Leases	Leases The Company determines if a contract is or contains a lease at inception or modification of a contract. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both (a) the right to obtain substantially all of the economic benefits from the use of the asset and (b) the right to direct the use of the asset. Right-of-use assets and liabilities are recognized based on the present value of future minimum lease payments over the expected lease term at commencement date. The Company measures and records a right-of-use asset and lease liability based on the discount rate implicit in the lease, if known. In cases where the discount rate implicit in the lease is not known, the Company measures the right-of-use assets and lease liabilities using a discount rate equal to the Company’s estimated incremental borrowing rate for loans with similar collateral and duration. The Company elected to not apply the recognition requirements to leases of all classes of underlying assets that, at the commencement date, have a lease term of 12 months or less and do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise. Instead, lease payments for such short-term leases are recognized in operations on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred.
Stock-Based Compensation	Stock-Based Compensation The Company accounts for employee and non-employee share-based compensation in accordance with the provisions of ASC 718, Compensation – Stock Compensation . Under ASC 718, share-based compensation cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the requisite service period (generally the vesting period of the equity grant). The estimated fair value of Common Stock option awards is calculated using the Black-Scholes option pricing model, based on key assumptions such as fair value of Common Stock, expected volatility, and expected term. These estimates require the input of subjective assumptions, including (i) the expected stock price volatility, (ii) the calculation of the expected term of the award, (iii) the risk-free rate and (iv) expected dividend yields. As there has not been a historic public market for the Company’s Common Stock, management has determined the expected stock price volatility at the time of grant of the option by considering a number of objective and subjective factors, including stock price volatility of comparable companies that are publicly available and based on the industry, stage of life cycle, size and financial leverage of such other comparable companies. Management has estimated the expected term of its Common Stock options using the “simplified” method, whereby, the expected term equals the arithmetic average of the vesting term and the original contractual term of the option due to its lack of sufficient historical data. The risk-free interest rates for periods within the expected term of the option are based on the US Treasury securities with a maturity date that commensurate with the expected term of the associated award. There is no expected dividend yield since the Company has never paid cash dividends and does not expect to pay cash dividends in the foreseeable future. For stock options issued to employees and non-employees where vesting is contingent upon a service period, the fair value of stock-based awards is recognized as compensation expense over the requisite service period, which is defined as the period during which an employee is required to provide service in exchange for an award. The Company uses a straight-line attribution method for all grants that include only a service condition. For stock options issued to employees and non-employees were vesting is contingent upon meeting performance criteria, the fair value of the stock-based awards vests when the performance criteria has been met. The Company accounts for forfeitures when they occur. Stock-based compensation expense recognized in the financial statements is reduced by actual awards forfeited.
Net Loss Per Common Share	Net Loss Per Common Share Basic net loss per share excludes the effect of dilution and is computed by dividing the net loss attributable to common shareholders by the weighted-average number of shares of Common Stock outstanding during the period, without consideration of potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common shareholders by the weighted-average number of Common Stock and potentially dilutive securities outstanding for the period. For purposes of the diluted net loss per share calculation, convertible preferred stock, stock options, Common Stock subject to repurchase related to early exercise of stock options, convertible stock warrants and convertible notes are considered to be potentially dilutive securities. As the Company has reported a net loss for all periods presented, diluted net loss per common share is the same as basic net loss per common share for those periods.
Common Stock Warrants	Common Stock Warrants The Company has issued warrants, which allow the warrant holder to purchase one share of stock at a specified price for a specified period of time. The Company records equity instruments including warrants based on the fair value at the date of issue. The fair value of warrants classified as equity instruments at the date of issuance is estimated using the Black-Scholes model and is recorded to additional paid-in-capital.
Revenue Recognition	Revenue Recognition In accordance with ASC 606, Revenue from Contracts with Customers, revenue is recognized when a customer obtains control of promised goods or services. The guidance focuses on the core principle for revenue recognition, which is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company recognizes revenue in accordance with ASC 606, which provides a five-step model for recognizing revenue from contracts with customers as follows: • Step 1: Identify the contract(s) with a customer • Step 2: Identify the performance obligations in the contract • Step 3: Determine the transaction price • Step 4: Allocate the transaction price to the performance obligations in the contract • Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation A contract with a customer exists when (i) the Company enters into a legally enforceable contract with a customer, through a purchase order, that defines each party’s rights regarding the products to be transferred and identifies the payment terms related to these products, (ii) the contract has commercial substance and, (iii) the Company determines that collection of substantially all consideration for products that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The only performance obligation is to create and ship the product and each product has separate, distinct pricing. Performance obligations are met and revenue is recognized at a point in time when the order for its goods are shipped FOB manufacturer and control is transferred. The transaction price is determined based on the amount expected to be entitled to in exchange for transferring the product to the customer net of any transaction price adjustments. The Company’s payment terms to customers generally range from 30 to 60 days. Payment terms fall within the one-year guidance for the practical expedient which allows the Company to forgo adjustment of the promised amount of consideration for the effects of a significant financing component. The Company accepts product returns at its discretion or if the product is defective as manufactured. Historically, the actual product returns have been immaterial to the Company’s financial statements. The Company elected to treat shipping and handling costs as a fulfillment cost and included them in the cost of goods sold as incurred. Costs associated with product sales include commissions. The Company applies the practical expedient and recognizes commissions as expense when incurred because the expense is incurred at a point in time and the amortization period is less than one year. Commissions are recorded as selling expense. The Company did not recognize material revenues during the three and nine month periods ended January 31, 2024 and 2023. The Company’s revenues do not require significant estimates or judgments. The Company is not a party to contracts that include multiple performance obligations or material variable consideration. As of January 31, 2024 and April 30, 2023, the Company did no t have any contract assets or liabilities from contracts with customers and there were no remaining performance obligations that the Company had not satisfied.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method, which requires recognition of deferred tax assets, subject to valuation allowances, and liabilities for the expected future tax consequences of events that have been included in the financial statements or tax returns. Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting and income tax purposes. Management considers many factors when assessing the likelihood of future realization of deferred tax assets, including recent cumulative experience by taxing jurisdiction, expectations of future taxable income or loss, the carry-forward periods available to the Company for tax reporting purposes, and other relevant factors. A valuation allowance is established if it is more likely than not that all or a portion of the net deferred tax assets will not be realized. Accruals for uncertain tax positions are provided for in accordance with applicable accounting standards. The Company may recognize the tax benefits from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Judgment is required in assessing the future tax consequences of events that have been recognized in the financial statements or tax returns. Based on its analysis, management has determined that it has not incurred any liability for unrecognized tax benefits as of January 31, 2024 and April 30, 2023. The Company may be subject to potential examination by U.S. federal, U.S. states or foreign jurisdiction authorities in the areas of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income among various tax jurisdictions and compliance with U.S. federal, U.S. state and foreign tax laws. The Company is subject to income taxes in the U.S. federal jurisdiction and franchise taxes in the State of Texas. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. Generally, the Company is no longer subject to income tax examinations by major taxing authorities for years before 2018.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Jan. 31, 2024
Summary of Significant Accounting Policies [Abstract]
Summary of Inventories	The following is a summary of the Company’s inventories at January 31, 2024 and April 30, 2023: January 31, April 30, 2024 2023 Raw materials $ 322,996 $ 322,996 Sub-assemblies 341,355 347,436 Work in progress 21,741 21,741 Finished goods 28,662 28,662 Reserve for obsolescence ( 44,476 ) ( 44,476 ) Total Inventory $ 670,278 $ 676,359
Summary of Property and Equipment	The following is a summary of the Company’s property and equipment at January 31, 2024 and April 30, 2023: January 31, April 30, 2024 2023 Equipment $ 413,576 $ 397,920 Furniture & fixtures 102,563 102,563 Leasehold improvements 32,812 32,812 Total 548,951 533,295 Less: Accumulated depreciation ( 490,558 ) ( 471,867 ) Property and equipment, net $ 58,393 $ 61,428

Debt (Tables)

Debt (Tables)	9 Months Ended
	Jan. 31, 2024
Debt Disclosure [Abstract]
Summary of Debt	Debt consists of the following: January 31, April 30, 2024 2023 $1M Notes $ 500,000 $ 1,000,000 Less: current maturities ( 500,000 ) ( 500,000 ) Notes payable, long-term $ — $ 500,000

Stockholders' Equity (Deficit)

Stockholders' Equity (Deficit) (Tables)	9 Months Ended
	Jan. 31, 2024
Equity [Abstract]
Summary of Common Stock	During the nine months ended January 31, 2024, the Company issued 53,493,190 shares of Common Stock, as set forth in the below table: Number of Shares Issuance of Common Stock under Equity Line 1,386,498 Issuance of Common Stock under ATM Facility 40,359,917 Issuance of Common Stock for note conversions 6,781,288 Issuance of Common Stock pursuant to MTS Transaction (see Note 8) 4,854,853 Issuance of Common Stock as payment for consulting services rendered 108,696 Conversion of Series C Preferred Stock to Common Stock 1,938 Common Stock issued during the nine months ended January 31, 2024 53,493,190 Summary table of Common Stock share transactions: Balance at April 30, 2023 10,118,440 Issued in Fiscal 2024 53,493,190 Balance at January 31, 2024 63,611,630
Summary of Warrant Activity	The following is a summary of warrant activity during the nine months ended January 31, 2024: Warrants Exercise Price Weighted Average Strike Price per Share Balance, April 30, 2023 2,590,342 $ 0.00001 -$ 15.18 $ 3.73 Issued 3,079,753 $ 0.00001 -$ 0.73 $ 0.24 Cancelled ( 16,314 ) $ 3.47 -$ 15.18 - Balance, January 31, 2024 5,653,781 $ 0.00001 -$ 8.25 $ 1.82

Stock-based Compensation (Table

Stock-based Compensation (Tables)	9 Months Ended
	Jan. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Summary of Stock Option Using the Black-Scholes Option-Pricing Model on Grant Date	For the nine months ended January 31, 2024, the assumptions used in the Black-Scholes option pricing model, which was used to estimate the grant date fair value per option, was as follows: Risk free interest rate 4.1 % Volatility 85.8 % Dividend yield — Expected term (years) 5.0
Service-based Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Summary of Stock Option Activity	The following is a summary of service-based stock option activity during the nine months ended January 31, 2024: Number of Weighted Average Outstanding - April 30, 2023 1,182,912 $ 3.29 8.6 Granted 150,000 0.13 10.0 Options forfeited ( 114,545 ) 13.11 — Outstanding - January 31, 2024 1,218,367 $ 1.98 8.6 Non-vested at January 31, 2024 970,326 $ 0.84 9.3 Vested at January 31, 2024 248,041 $ 6.41 5.8
Performance-based Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Summary of Stock Option Activity	The following is a summary of performance-based stock option activity during the nine months ended January 31, 2024: Number of Weighted Average Outstanding - April 30, 2023 578,207 $ 5.17 7.8 Options forfeited ( 11,667 ) 12.21 — Outstanding - January 31, 2024 566,540 $ 5.03 6.2 Non-vested at January 31, 2024 377,588 $ 6.21 6.0 Vested at January 31, 2024 188,952 $ 2.67 6.5 Management estimates the fair values of stock options using the Black-Scholes option-pricing model on the date of grant. For the nine months ended January 31, 2024, the assumptions used in the Black-Scholes option pricing model, which was used to estimate the grant date fair value per option, was as follows: Risk free interest rate 4.1 % Volatility 85.8 % Dividend yield — Expected term (years) 5.0 During the nine months ended January 31, 2024 and 2023, the Company recognized stock based compensation for stock options of $ 326,578 and $ 149,153 , respectively.

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Jan. 31, 2024
Income Tax Disclosure [Abstract]
Summary of Significant Portions of Deferred Tax Assets and Liabilities	The tax effects of temporary differences and carry-forwards that give rise to significant portions of the deferred tax assets and liabilities are presented below: January 31, April 30, 2024 2023 Deferred tax assets (liabilities): Net operating loss carryforwards $ 10,965,829 $ 9,701,650 Start-up costs 859,188 934,999 Stock option and warrant payments 677,732 538,669 Accumulated depreciation ( 3,282 ) ( 3,111 ) Research and development credits 255,600 255,600 Research and development warrants 21,488 21,488 Total deferred tax assets, net 12,776,555 11,449,295 Valuation Allowance ( 12,776,555 ) ( 11,449,295 ) Net Deferred Tax Assets $ — $ —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Jan. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Information Related to Right-of-Use Assets and Lease Liabilities	Information related to the Company’s right-of-use assets and lease liabilities consist of the following: January 31, 2024 Right-of-use assets $ 482,743 Lease liabilities, current 98,319 Lease liabilities, net of current portion 460,859 Total lease liabilities $ 559,178 Weighted average remaining term (in years) 4.3 Weighted average discount rate 12 %
Schedule of Future Maturities of Lease Liabilities	As of January 31, 2024, future maturities of lease liabilities due under lease agreements for the fiscal year ended are as follows: April 30, 2024 $ 39,389 April 30, 2025 161,167 April 30, 2026 165,190 April 30, 2027 169,307 April 30, 2028 173,559 Thereafter 14,493 Subtotal 723,105 Less imputed interest ( 163,927 ) Total operating lease liabilities $ 559,178

Liquidity, Going Concern and _2

Liquidity, Going Concern and Other Uncertainties - Additional Information (Details) - USD ($)

1 Months Ended

9 Months Ended

Mar. 13, 2024

Feb. 29, 2024

Jan. 31, 2024

Sep. 18, 2023

Mar. 10, 2023

Nov. 30, 2023

Sep. 30, 2023

Mar. 16, 2023

Jan. 31, 2024

Jan. 31, 2023

Mar. 14, 2024

Apr. 30, 2023

Unusual Risk or Uncertainty [Line Items]

Accumulated deficit

$ (65,516,242)

$ (65,516,242)

$ (60,757,198)

Sale of common stock

$ 50,000,000

Proceeds from common stock

$ 5,194,740

Stock issued during period

53,493,190

Common stock, par value

$ 0.001

$ 0.001

$ 0.001

Purchase Agreement And Registration Rights Agreement

Unusual Risk or Uncertainty [Line Items]

Term of purchases agreement

36 months

36 months

Common stock, par value

$ 0.001

Maximum | ATM Facility

Unusual Risk or Uncertainty [Line Items]

Sale of common stock

$ 3,250,000

Common Stock

Unusual Risk or Uncertainty [Line Items]

Stock issued during period

53,493,190

Common stock, par value

$ 1.49

$ 1.49

Common Stock | ATM Facility

Unusual Risk or Uncertainty [Line Items]

Stock issued during period

40,359,917

Common Stock | Purchase Agreement And Registration Rights Agreement

Unusual Risk or Uncertainty [Line Items]

Proceeds from common stock

$ 1,100,000

Stock issued during period

100,000

1,864,522

Common Stock | Equity Distribution Agreement

Unusual Risk or Uncertainty [Line Items]

Proceeds from common stock

$ 9,200,000

Stock issued during period

40,359,917

Common stock outstanding

$ 75,000,000

Common Stock | Maximum | Purchase Agreement And Registration Rights Agreement

Unusual Risk or Uncertainty [Line Items]

Sale of common stock

$ 15,000,000

Common Stock | Maximum | Equity Distribution Agreement

Unusual Risk or Uncertainty [Line Items]

Sale of common stock

15,000,000

$ 3,250,000

Common Stock | Maximum | Equity Distribution Agreement | ATM Facility

Unusual Risk or Uncertainty [Line Items]

Sale of common stock

11,000,000

Common Stock | Minimum | Equity Distribution Agreement

Unusual Risk or Uncertainty [Line Items]

Sale of common stock

$ 3,250,000

Common Stock | Subsequent Event

Unusual Risk or Uncertainty [Line Items]

Proceeds from common stock

$ 165,000

Stock issued during period

1,400,000

Common stock, par value

$ 1.46

Common Stock | Subsequent Event | ATM Facility

Unusual Risk or Uncertainty [Line Items]

Proceeds from common stock

$ 78,000

Stock issued during period

550,000

Common Stock | Subsequent Event | Purchase Agreement And Registration Rights Agreement

Unusual Risk or Uncertainty [Line Items]

Proceeds from common stock

$ 165,000

Stock issued during period

1,400,000

Common Stock | Subsequent Event | Equity Distribution Agreement | ATM Facility

Unusual Risk or Uncertainty [Line Items]

Proceeds from common stock

$ 78,000

Stock issued during period

550,000

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Summary of Inventories (Details) - USD ($)	Jan. 31, 2024	Apr. 30, 2023
Inventory, Net [Abstract]
Raw materials	$ 322,996	$ 322,996
Sub-assemblies	341,355	347,436
Work in progress	21,741	21,741
Finished goods	28,662	28,662
Reserve for obsolescence	(44,476)	(44,476)
Total Inventory	$ 670,278	$ 676,359

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	9 Months Ended
	Jan. 31, 2024	Apr. 30, 2023
Summary of Significant Accounting Policies [Line Items]
Useable life of device over years	7 years
Deferred offering costs	$ 655,579	$ 175,921
Contract assets from contracts with customers	0	0
Contract liabilities from contracts with customers	0	0
Remaining performance obligations	$ 0	$ 0
Minimum
Summary of Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Customers payment terms	30 days
Maximum
Summary of Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Lease term	12 months
Customers payment terms	60 days

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Summary of Property and Equipment (Details) - USD ($)	Jan. 31, 2024	Apr. 30, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 548,951	$ 533,295
Less: Accumulated depreciation	(490,558)	(471,867)
Property and equipment, net	58,393	61,428
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	413,576	397,920
Furniture & fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	102,563	102,563
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 32,812	$ 32,812

Debt - Summary of Debt (Details

Debt - Summary of Debt (Details) - USD ($)	Jan. 31, 2024	Apr. 30, 2023
Debt Instrument [Line Items]
Less: current maturities	$ (500,000)	$ (500,000)
Notes payable, long-term		500,000
$1M Notes
Debt Instrument [Line Items]
Notes payable	$ 500,000	$ 1,000,000

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)

1 Months Ended

9 Months Ended

Nov. 16, 2023

Sep. 30, 2023

Sep. 20, 2023

Sep. 08, 2023

Jan. 31, 2023

Jun. 28, 2022

May 24, 2022

Nov. 03, 2021

Sep. 04, 2020

Jul. 02, 2020

Sep. 30, 2023

Jun. 30, 2022

Apr. 30, 2020

Jan. 31, 2024

Oct. 31, 2023

Sep. 06, 2023

Apr. 30, 2023

Debt Instrument [Line Items]

Stock issued during period

53,493,190

Conversion price of common stock

$ 0.001

$ 0.001

Matthews Southwest Holdings, Inc., | MSW Warrant Amendment

Debt Instrument [Line Items]

Warrants exercise price

$ 0.16

Mr. Adams | Adam Warrant Amendment

Debt Instrument [Line Items]

Warrants exercise price

$ 0.16

Common Stock

Debt Instrument [Line Items]

Stock issued during period

53,493,190

Conversion price of common stock

$ 1.49

$1M Lender Warrants

Debt Instrument [Line Items]

Warrants issued to purchase common stock

200,000

John Q. Adams

Debt Instrument [Line Items]

Interest Accrued Due Payable Date

Mar. 31, 2024

Sep. 30, 2023

FRV

Debt Instrument [Line Items]

Maturity date

Sep. 30, 2024

M S W Note [Member] | Warrants Exercisable at 1.00 Per Share

Debt Instrument [Line Items]

Warrants issued to purchase common stock

500,000

500,000

Warrants exercise price

$ 1

$ 1

M S W Note [Member] | Warrants Exercisable at 1.25 Per Share

Debt Instrument [Line Items]

Warrants issued to purchase common stock

250,000

250,000

Warrants exercise price

$ 1.25

$ 1.25

M S W Note [Member] | Warrants Exercisable at 1.50 Per Share

Debt Instrument [Line Items]

Warrants issued to purchase common stock

250,000

250,000

Warrants exercise price

$ 1.5

$ 1.5

M S W Note [Member] | Matthews Southwest Holdings, Inc.,

Debt Instrument [Line Items]

Proceeds from notes payable

$ 250,000

$ 250,000

$ 500,000

M S W Note [Member] | Matthews Southwest Holdings, Inc., | Warrants Exercisable at 1.00 Per Share

Debt Instrument [Line Items]

Warrants issued to purchase common stock

500,000

500,000

Warrants exercise price

$ 1

$ 1

M S W Note [Member] | Matthews Southwest Holdings, Inc., | Warrants Exercisable at 1.25 Per Share

Debt Instrument [Line Items]

Warrants issued to purchase common stock

250,000

250,000

Warrants exercise price

$ 1.25

$ 1.25

M S W Note [Member] | Matthews Southwest Holdings, Inc., | Warrants Exercisable at 1.50 Per Share

Debt Instrument [Line Items]

Warrants issued to purchase common stock

250,000

250,000

Warrants exercise price

$ 1.5

$ 1.5

M S W Note [Member] | Matthews Southwest Holdings, Inc., | MSW Warrant Amendment

Debt Instrument [Line Items]

Warrants exercise price aggregate

1,000,000

Warrants exercise price

$ 0.16

Loan and Security Agreement

Debt Instrument [Line Items]

Principal amount

$ 1,000,000

Proceeds from notes payable

$ 350,000

$ 350,000

$ 300,000

Maturity date

Sep. 30, 2023

Sep. 30, 2022

Sep. 30, 2021

Accrued interest rate per annum

12%

Accrued interest

$ 248,000

$ 238,000

Default interest rate

18%

Loan and Security Agreement | $1M Lender Warrants | Mr. Adams | Adam Warrant Amendment

Debt Instrument [Line Items]

Warrants exercise price aggregate

107,575

Warrants exercise price

$ 0.16

Loan and Security Agreement | John Q. Adams

Debt Instrument [Line Items]

Principal amount

$ 500,000

Accrued interest paid

$ 126,000

Loan and Security Agreement | FRV | John Q. Adams

Debt Instrument [Line Items]

Principal amount

$ 500,000

Note Conversion Letter Agreement | Mr. Adams

Debt Instrument [Line Items]

Conversion amount

$ 585,006

Note Conversion Letter Agreement | Common Stock | Mr. Adams

Debt Instrument [Line Items]

Stock issued during period

3,656,288

Note Conversion Letter Agreement | M S W Note [Member] | Matthews Southwest Holdings, Inc.,

Debt Instrument [Line Items]

Conversion amount

$ 500,000

Stock issued during period

3,125,000

Conversion price of common stock

$ 0.16

Maximum

Debt Instrument [Line Items]

Warrants exercise price

$ 8.25

$ 15.18

Maximum | M S W Note [Member] | Matthews Southwest Holdings, Inc.,

Debt Instrument [Line Items]

Unsecured drawdown loan

$ 1,000,000

Remaining borrowing capacity

$ 500,000

Minimum

Debt Instrument [Line Items]

Warrants exercise price

$ 0.00001

$ 0.00001

Stockholders' Equity (Deficit_2

Stockholders' Equity (Deficit) - Preferred Stock - Additional Information (Details)		9 Months Ended
	Mar. 14, 2024 $ / shares shares	Jan. 31, 2024 USD ($) $ / shares shares	Jan. 31, 2023 shares	Apr. 30, 2023 $ / shares shares
Class of Stock [Line Items]
Number of preferred stock converted		1,938
Preferred stock, shares authorized		20,000,000
Preferred stock par value | $ / shares		$ 0.001
Common stock, par value | $ / shares		$ 0.001		$ 0.001
Common Stock
Class of Stock [Line Items]
Number of preferred stock converted		6,366,520
Common stock, par value | $ / shares		$ 1.49
Common Stock | Subsequent Event
Class of Stock [Line Items]
Number of preferred stock converted	6,513,456
Common stock, par value | $ / shares	$ 1.46
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized		10,000
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized		10,000
Series C Preferred Stock
Class of Stock [Line Items]
Number of preferred stock converted		431
Conversion ratio		4.4981
Preferred stock, shares authorized		600,000
Offering price per unit | $ / shares		$ 25
Preferred stock, shares outstanding		380,440		380,871
Preferred stock dividends rate per share | $ / shares		$ 1.5
Dividends declared | $		$ 0
Preferred stock, voting rights		The holders of the shares of Series C Preferred Stock have voting rights equal to an equivalent number of shares of Common Stock into which it is convertible and vote together as one class with Common Stock.
Series C Preferred Stock | FRV | Minimum
Class of Stock [Line Items]
Preferred stock, shares outstanding		71,000
Series C Preferred Stock | Common Stock
Class of Stock [Line Items]
Number of preferred stock converted		1,938	230,086

Stockholders' Equity (Deficit_3

Stockholders' Equity (Deficit) - Common Stock - Additional Information (Details) - USD ($)						1 Months Ended			9 Months Ended		12 Months Ended
	Jan. 31, 2024	Nov. 17, 2023	Nov. 09, 2023	Sep. 18, 2023	Mar. 10, 2023	Nov. 30, 2023	Sep. 30, 2023	Mar. 16, 2023	Jan. 31, 2024	Jan. 31, 2023	Apr. 30, 2023
Class of Stock [Line Items]
Number of preferred stock converted									1,938
Stock issued during period									53,493,190
Common stock, shares authorized	500,000,000								500,000,000		500,000,000
Common stock, par value	$ 0.001								$ 0.001		$ 0.001
Common stock, shares, issued	63,611,630								63,611,630		10,118,440
Proceeds from common stock										$ 5,194,740
Sale of common stock				$ 50,000,000
Dividends declared									$ 0		$ 0
Purchase Agreement And Registration Rights Agreement
Class of Stock [Line Items]
Common stock, par value								$ 0.001
Term of purchases agreement					36 months			36 months
Declared effective date											Apr. 10, 2023
Maximum | ATM Facility
Class of Stock [Line Items]
Sale of common stock				3,250,000
Maximum | At-the-Market Offering
Class of Stock [Line Items]
Sale of common stock				$ 3,250,000
Common Stock
Class of Stock [Line Items]
Number of preferred stock converted									6,366,520
Stock issued during period									53,493,190
Common stock, par value	$ 1.49								$ 1.49
Common Stock | MSW and JQA Notes
Class of Stock [Line Items]
Stock issued during period									6,781,288
Common Stock | ATM Facility
Class of Stock [Line Items]
Stock issued during period									40,359,917
Common Stock | Consulting Services
Class of Stock [Line Items]
Stock issued during period									108,696
Common Stock | Purchase Agreement And Registration Rights Agreement
Class of Stock [Line Items]
Stock issued during period	100,000								1,864,522
Proceeds from common stock									$ 1,100,000
Common Stock | Purchase Agreement And Registration Rights Agreement | Lincoln Park Capital Fund, LLC
Class of Stock [Line Items]
Stock issued during period									1,386,498
Proceeds from common stock									$ 700,000
Common Stock | EDA
Class of Stock [Line Items]
Stock issued during period									40,359,917
Proceeds from common stock									$ 9,200,000
Common Stock | Minimum | EDA
Class of Stock [Line Items]
Sale of common stock						$ 3,250,000
Common Stock | Maximum | Purchase Agreement And Registration Rights Agreement
Class of Stock [Line Items]
Purchase price of common stock					$ 15,000,000
Sale of common stock								$ 15,000,000
Common Stock | Maximum | EDA
Class of Stock [Line Items]
Sale of common stock						15,000,000	$ 3,250,000
Common Stock | Maximum | EDA | ATM Facility
Class of Stock [Line Items]
Sale of common stock						$ 11,000,000
Common Stock | Maxim | ATM Facility
Class of Stock [Line Items]
Stock issued during period									40,359,917
Proceeds from common stock									$ 9,200,000
Common Stock | Maxim | Maximum | EDA
Class of Stock [Line Items]
Sale of common stock		$ 15,000,000	$ 10,000,000
Common Stock | Mount Sinai | License Agreement
Class of Stock [Line Items]
Stock issued during period						4,854,853

Stockholders' Equity (Deficit_4

Stockholders' Equity (Deficit) - Common Stock Warrants - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Jan. 31, 2024	Nov. 30, 2023	Nov. 16, 2023	Oct. 31, 2023	Sep. 30, 2023	Apr. 30, 2023
MSW Warrant Amendment | MSW
Class of Stock [Line Items]
Warrants exercise price			$ 0.16
Warrants Exercisable at 0.73 Per Share | Consulting Services
Class of Stock [Line Items]
Warrants issued to purchase common stock					15,000
Warrants exercise price					$ 0.73
Warrants Exercisable At 0.44 Per Share | FRV and John Q. Adams
Class of Stock [Line Items]
Warrants issued to purchase common stock				200,000
Warrants exercise price				$ 0.44
Warrants and rights outstanding				$ 1
Adam Warrant Amendment | Mr. Adams
Class of Stock [Line Items]
Warrants exercise price			0.16
Warrants Exercisable at 0.17 Per Share | Consulting Services
Class of Stock [Line Items]
Warrants exercise price		$ 0.17
MSW Note | Warrants Exercisable at 1.00 Per Share
Class of Stock [Line Items]
Warrants issued to purchase common stock					500,000
Warrants exercise price					$ 1
MSW Note | Warrants Exercisable at 1.00 Per Share | MSW
Class of Stock [Line Items]
Warrants issued to purchase common stock					500,000
Warrants exercise price					$ 1
MSW Note | Warrants Exercisable at 1.25 Per Share
Class of Stock [Line Items]
Warrants issued to purchase common stock					250,000
Warrants exercise price					$ 1.25
MSW Note | Warrants Exercisable at 1.25 Per Share | MSW
Class of Stock [Line Items]
Warrants issued to purchase common stock					250,000
Warrants exercise price					$ 1.25
MSW Note | Warrants Exercisable at 1.50 Per Share
Class of Stock [Line Items]
Warrants issued to purchase common stock					250,000
Warrants exercise price					$ 1.5
MSW Note | Warrants Exercisable at 1.50 Per Share | MSW
Class of Stock [Line Items]
Warrants issued to purchase common stock					250,000
Warrants exercise price					$ 1.5
MSW Note | MSW Warrant Amendment | MSW
Class of Stock [Line Items]
Warrants exercise price			$ 0.16
Maximum
Class of Stock [Line Items]
Warrants exercise price	$ 8.25					$ 15.18
Maximum | Warrants Exercisable at 0.17 Per Share | Consulting Services
Class of Stock [Line Items]
Warrants issued to purchase common stock		240,000
Minimum
Class of Stock [Line Items]
Warrants exercise price	$ 0.00001					$ 0.00001
Common Stock Warrants
Class of Stock [Line Items]
Warrants convertible into common stock from date of issuance	5 years
Common Stock Warrants | Mount Sinai
Class of Stock [Line Items]
Warrants exercise price		$ 0.506
Common Stock Warrants | Maximum | Mount Sinai
Class of Stock [Line Items]
Warrants issued to purchase common stock		914,148
Pre-Funded Warrants | Mount Sinai
Class of Stock [Line Items]
Warrants exercise price		$ 0.00001
Pre-Funded Warrants | Maximum | Mount Sinai
Class of Stock [Line Items]
Warrants issued to purchase common stock		710,605

Stockholders' Equity (Deficit_5

Stockholders' Equity (Deficit) - Summary of Issued Shares of Common Stock (Details) - shares	3 Months Ended	9 Months Ended
	Jan. 31, 2024	Jan. 31, 2024	Jan. 31, 2023
Class of Stock [Line Items]
Stock issued during period		53,493,190
Stock issued upon conversion		1,938
Series C Preferred Stock
Class of Stock [Line Items]
Stock issued upon conversion		431
Common Stock
Class of Stock [Line Items]
Stock issued during period		53,493,190
Stock issued upon conversion		6,366,520
Common Stock | MTS Transaction
Class of Stock [Line Items]
Stock issued during period		4,854,853
Common Stock | Consulting Services
Class of Stock [Line Items]
Stock issued during period		108,696
Common Stock | Equity Line
Class of Stock [Line Items]
Stock issued during period		1,386,498
Common Stock | Note Conversions
Class of Stock [Line Items]
Stock issued during period		6,781,288
Stock issued upon conversion	6,781,288	6,781,288
Common Stock | Series C Preferred Stock
Class of Stock [Line Items]
Stock issued upon conversion		1,938	230,086
Common Stock | ATM Facility
Class of Stock [Line Items]
Stock issued during period		40,359,917

Stockholders' Equity (Deficit_6

Stockholders' Equity (Deficit) - Summary of Common Stock Share Transactions (Details)	9 Months Ended
	Jan. 31, 2024 shares
Equity [Abstract]
Balance	10,118,440
Issued in Fiscal 2024	53,493,190
Balance	63,611,630

Stockholders' Equity (Deficit_7

Stockholders' Equity (Deficit) - Summary of Warrant Activity (Details)	9 Months Ended
	Jan. 31, 2024 $ / shares shares
Class of Warrant or Right [Line Items]
Warrants Outstanding and Exercisable, Beginning Balance | shares	2,590,342
Warrants Outstanding and Exercisable, Issued | shares	3,079,753
Warrants Outstanding and Exercisable, Cancelled | shares	(16,314)
Warrants Outstanding and Exercisable, Ending Balance | shares	5,653,781
Weighted Average Strike Price Per Share, Beginning Balance	$ 3.73
Weighted Average Strike Price Per Share, Issued	0.24
Weighted Average Strike Price Per Share, Cancelled	0
Weighted Average Strike Price Per Share, Ending Balance	1.82
Minimum
Class of Warrant or Right [Line Items]
Exercise Price Per Share, Beginning Balance	0.00001
Exercise Price Per Share, Issued	0.00001
Exercise Price Per Share, Cancelled	3.47
Exercise Price Per Share, Ending Balance	0.00001
Maximum
Class of Warrant or Right [Line Items]
Exercise Price Per Share, Beginning Balance	15.18
Exercise Price Per Share, Issued	0.73
Exercise Price Per Share, Cancelled	15.18
Exercise Price Per Share, Ending Balance	$ 8.25

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended		12 Months Ended
	Jan. 31, 2024	Jan. 31, 2024	Jan. 31, 2023	Apr. 30, 2023	Nov. 27, 2023	Mar. 15, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Contractual term				10 years
Stock based compensation for stock options		$ 326,578	$ 149,153
Service-based Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation costs	$ 200,000	$ 200,000
Exercise price	$ 0.13	$ 0.13
Stock options granted	150,000	150,000	0
Stock based compensation for stock options		$ 326,578	$ 149,153
Performance-based Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation costs	$ 1,600,000	$ 1,600,000
Executive Directors and Employees
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period				3 years
Directors
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period				12 months
Directors | 2023 Equity Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Aggregate number of shares authorized to issued					8,500,000	2,500,000
Number of shares common stock available for issuance						832,195

Stock-based Compensation - Summ

Stock-based Compensation - Summary of Stock Option Activity (Details) - $ / shares	1 Months Ended	9 Months Ended		12 Months Ended
	Jan. 31, 2024	Jan. 31, 2024	Jan. 31, 2023	Apr. 30, 2023
Service-based Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance, Number of options outstanding		1,182,912
Granted, Number of options outstanding	150,000	150,000	0
Options forfeited, Number of options outstanding		(114,545)
Ending Balance, Number of options outstanding	1,218,367	1,218,367		1,182,912
Non-vested, Number of options outstanding	970,326	970,326
Vested, Number of options outstanding	248,041	248,041
Weighted average exercise price
Beginning Balance, Weighted average exercise price		$ 3.29
Granted, Weighted average exercise price	$ 0.13	0.13
Options forfeited, Weighted average exercise price		13.11
Ending Balance, Weighted average exercise price	1.98	1.98		$ 3.29
Nonvested, Weighted average exercise price	0.84	0.84
Vested, Weighted average exercise price	$ 6.41	$ 6.41
Average remaining contractual life (in years)
Outstanding, Average remaining contractual life (in years)		8 years 7 months 6 days		8 years 7 months 6 days
Granted, Average remaining contractual life (in years)		10 years
Non-vested, Average remaining contractual life (in years)		9 years 3 months 18 days
Vested, Average remaining contractual life (in years)		5 years 9 months 18 days
Performance-based Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance, Number of options outstanding		578,207
Options forfeited, Number of options outstanding		(11,667)
Ending Balance, Number of options outstanding	566,540	566,540		578,207
Non-vested, Number of options outstanding	377,588	377,588
Vested, Number of options outstanding	188,952	188,952
Weighted average exercise price
Beginning Balance, Weighted average exercise price		$ 5.17
Options forfeited, Weighted average exercise price		12.21
Ending Balance, Weighted average exercise price	$ 5.03	5.03		$ 5.17
Nonvested, Weighted average exercise price	6.21	6.21
Vested, Weighted average exercise price	$ 2.67	$ 2.67
Average remaining contractual life (in years)
Outstanding, Average remaining contractual life (in years)		6 years 2 months 12 days		7 years 9 months 18 days
Non-vested, Average remaining contractual life (in years)		6 years
Vested, Average remaining contractual life (in years)		6 years 6 months

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Stock Option Using the Black-Scholes Option-Pricing Model on Grant Date (Details)	9 Months Ended
	Jan. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk free interest rate	4.10%
Volatility	85.80%
Expected term (years)	5 years

Income Taxes - Summary of Signi

Income Taxes - Summary of Significant Portions of Deferred Tax Assets and Liabilities (Details) - USD ($)	Jan. 31, 2024	Apr. 30, 2023
Deferred tax assets (liabilities):
Net operating loss carryforwards	$ 10,965,829	$ 9,701,650
Start-up costs	859,188	934,999
Stock option and warrant payments	677,732	538,669
Accumulated depreciation	(3,282)	(3,111)
Research and development credits	255,600	255,600
Research and development warrants	21,488	21,488
Total deferred tax assets, net	12,776,555	11,449,295
Valuation Allowance	(12,776,555)	(11,449,295)
Net Deferred Tax Assets	$ 0	$ 0

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - Federal Income Tax - USD ($) $ in Millions	9 Months Ended
	Jan. 31, 2024	Apr. 30, 2023
Operating Loss Carryforwards [Line Items]
Cumulative net operating loss	$ 52	$ 46
Net operating loss carry-forward expiration year	2028

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($)			9 Months Ended	12 Months Ended
	Feb. 29, 2024	Nov. 16, 2023	Jan. 31, 2024	Apr. 30, 2013	Mar. 14, 2024	Nov. 30, 2023	Apr. 30, 2023
Loss Contingencies [Line Items]
Lessee, operating lease, option to extend			On September 27, 2022, the Company entered into the First Amendment to Lease (the “Lease Amendment”), which amended the Lease Agreement to document the exercise of its option to extend the term of the lease for an additional 64 months, commencing February 1, 2023, and expiring on May 31, 2028 (the “Extension Term”). Pursuant to the amendment, the Company will pay initial monthly payments of $13,129, beginning February 2023, subject to 3% annual increases.
Operating lease percentage of annual increase			3%
Operating lease commencing date			Feb. 01, 2023
Operating lease expiring date			May 31, 2028
Operating lease option to extend additional lease term			64 months
Initial monthly payments			$ 13,129
Rent expense			$ 111,000
Operating lease incremental borrowing rate			12%
Common stock, par value			$ 0.001				$ 0.001
Stock issued during period			53,493,190
Common Stock
Loss Contingencies [Line Items]
Common stock, par value			$ 1.49
Stock issued during period			53,493,190
Common Stock | Subsequent Event
Loss Contingencies [Line Items]
Common stock, par value					$ 1.46
Stock issued during period	1,400,000
Mount Sinai | Pre-Funded Warrants
Loss Contingencies [Line Items]
Warrants exercise price						$ 0.00001
Mount Sinai | Common Stock Warrants
Loss Contingencies [Line Items]
Warrants exercise price						$ 0.506
Minimum
Loss Contingencies [Line Items]
Warrants exercise price			$ 0.00001				0.00001
Maximum
Loss Contingencies [Line Items]
Warrants exercise price			$ 8.25				$ 15.18
Maximum | Mount Sinai | Pre-Funded Warrants
Loss Contingencies [Line Items]
Warrants issued to purchase common stock						710,605
Maximum | Mount Sinai | Common Stock Warrants
Loss Contingencies [Line Items]
Warrants issued to purchase common stock						914,148
Securities Purchase Agreement | Common Stock
Loss Contingencies [Line Items]
Stock issued during period			4,854,853
Securities Purchase Agreement | Mount Sinai
Loss Contingencies [Line Items]
Term of purchases agreement		150 days
Securities Purchase Agreement | Mount Sinai | Common Stock
Loss Contingencies [Line Items]
Stock issued during period		4,854,853
Securities Purchase Agreement | Mount Sinai | Pre-Funded Warrants
Loss Contingencies [Line Items]
Warrants exercise price		$ 0.00001
Securities Purchase Agreement | Mount Sinai | Common Stock Warrants
Loss Contingencies [Line Items]
Warrants exercise price		$ 0.506
Securities Purchase Agreement | Maximum | Mount Sinai | Pre-Funded Warrants
Loss Contingencies [Line Items]
Warrants issued to purchase common stock		710,605
Securities Purchase Agreement | Maximum | Mount Sinai | Common Stock Warrants
Loss Contingencies [Line Items]
Warrants issued to purchase common stock		914,148
Secured Convertible Promissory Notes | Common Stock
Loss Contingencies [Line Items]
Stock issued during period			6,781,288
Royalty Agreements
Loss Contingencies [Line Items]
Royalty not paid balance amount				$ 3,500,000
Royalties total amount				$ 3,500,000
Common stock, par value				$ 68.75
Receipt of bona fide offer valuing common stock				$ 68.75
Aggregate payment of royalties				3,000,000
Royalty Agreements | Secured Convertible Promissory Notes
Loss Contingencies [Line Items]
Notes payable				1,500,000
Royalty Agreements | Loan and Security Agreement
Loss Contingencies [Line Items]
Notes payable				1,000,000
Royalty Agreements | MyoVista Devices
Loss Contingencies [Line Items]
Royalty payment upon paid for each device amount				200
Royalty Agreements | 2,400 MyoVista Devices
Loss Contingencies [Line Items]
Royalty payment upon paid for each device amount				$ 500

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Information Related to Right-of-Use Assets and Lease Liabilities (Details) - USD ($)	Jan. 31, 2024	Apr. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Right-of-use assets	$ 482,743	$ 529,224
Lease liabilities, current	98,319	29,535
Lease liabilities, net of current portion	460,859	$ 536,335
Total operating lease liabilities	$ 559,178
Weighted average remaining term (in years)	4 years 3 months 18 days
Weighted average discount rate	12%

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Future Maturities of Lease Liabilities (Details)	Jan. 31, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
April 30, 2024	$ 39,389
April 30, 2025	161,167
April 30, 2026	165,190
April 30, 2027	169,307
April 30, 2028	173,559
Thereafter	14,493
Subtotal	723,105
Less imputed interest	(163,927)
Total operating lease liabilities	$ 559,178

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($)				9 Months Ended
	Mar. 13, 2024	Feb. 29, 2024	Nov. 16, 2023	Jan. 31, 2024	Jan. 31, 2023
Subsequent Event [Line Items]
Stock issued during period				53,493,190
Proceeds from common stock					$ 5,194,740
Common Stock
Subsequent Event [Line Items]
Stock issued during period				53,493,190
Common Stock | Subsequent Event
Subsequent Event [Line Items]
Stock issued during period		1,400,000
Proceeds from common stock		$ 165,000
Common Stock | ATM Facility
Subsequent Event [Line Items]
Stock issued during period				40,359,917
Common Stock | ATM Facility | Subsequent Event
Subsequent Event [Line Items]
Stock issued during period		550,000
Proceeds from common stock		$ 78,000
Common Stock | Maxim | ATM Facility
Subsequent Event [Line Items]
Stock issued during period				40,359,917
Proceeds from common stock				$ 9,200,000
Common Stock | EDA
Subsequent Event [Line Items]
Stock issued during period				40,359,917
Proceeds from common stock				$ 9,200,000
Common Stock | EDA | ATM Facility | Subsequent Event
Subsequent Event [Line Items]
Stock issued during period	550,000
Proceeds from common stock	$ 78,000
Common Stock | Securities Purchase Agreement
Subsequent Event [Line Items]
Stock issued during period				4,854,853
Common Stock | Securities Purchase Agreement | Mount Sinai
Subsequent Event [Line Items]
Stock issued during period			4,854,853
Common Stock | Note Conversion Letter Agreement | Mr. Adams
Subsequent Event [Line Items]
Stock issued during period			3,656,288