v3.25.4

Share-Based Compensation and Warrants (Tables)

6 Months Ended

Dec. 31, 2025

Share-Based Compensation and Warrants

Schedule of the number of shares authorized, outstanding, and available for future grants under stock option

Presented below is a summary of the number of shares authorized, outstanding, and available for future grants under the Company’s equity incentive plans as of December 31, 2025:

​

​	​	​	​	​	​	​
​	​ ​ ​	Number of Shares
Description	​ ​ ​	Authorized	​ ​ ​	Outstanding	​ ​ ​	Available
2015 Plan		14,000	​	14,000		—
2016 Plan		121,200		121,200		—
2019 Plan		200,000		200,000		—
2021 Plan	​	21,051,536	​	14,702,929	​	6,348,607
Inducement Awards	​	1,500,000	​	742,500	​	757,500
Total		22,886,736		15,780,629	(1)	7,106,107

(1) Consists of approximately 13.2 million shares outstanding under stock option agreements and 2.6 million shares under restricted stock units.

Schedule of the stock option plans

For the six months ended December 31, 2025, the following table summarizes the combined stock option activity under the Company’s equity incentive plans and Inducement Awards:

​	​	​	​	​	​	​	​
​	​ ​ ​	Shares	​ ​ ​	Price (1)		​ ​ ​	Term (2)
Outstanding, beginning of period		13,027,994	​	$	4.03		7.7
Granted	​	2,221,000	​	​	9.23	​	​
Exercised	​	(328,134)	(3)	​	2.44	​	​
Expired	​	(4,700)	​	​	26.84	​	​
Forfeited	​	(1,753,031)	​	​	6.25	​	​
Outstanding, end of period		13,163,129	(4)		4.65		7.0
Vested, end of period		8,398,953	(5)		4.34		6.1

(1) Represents the weighted average exercise price.

(2) Represents the weighted average remaining contractual term for the number of years until the stock options expire.

(3) The total intrinsic value (the amount by which the fair market value exceeded the exercise price) of stock options exercised during the six months ended December 31, 2025, was $1.8 million.

(4) As of December 31, 2025, the intrinsic value of outstanding options was approximately $2.5 million.

(5) As of December 31, 2025, the intrinsic value of vested stock options was approximately $1.5 million.

Schedule of the fair value of stock options

For the six months ended December 31, 2025, the fair value of stock options was estimated on the respective dates of grant, with the following weighted-average assumptions:

​	​	​	​	​
Market price of common stock on grant date	​	$	9.23	​
Expected volatility	​ ​ ​	​	84	%
Risk free interest rate		​	3.8	%
Expected term (years)		​	5.9	​
Dividend yield		​	0	%

Schedule of the combined RSU activity

For the six months ended December 31, 2025, the following table sets forth a summary of the combined RSU activity under the Company’s 2021 Plan:

​	​	​	​	​	​
​	​ ​ ​	Shares	​ ​ ​	Price (1)
Unvested, beginning of period		1,056,500	​	$	4.55
Granted	​	1,915,000	​	​	10.11
Vested	​	—	​	​	—
Forfeited	​	(354,000)	​	​	9.51
Unvested, end of period		2,617,500	​		7.95

(1) Represents the weighted average grant price based on the closing market price on the date of each of the RSU grants.

Schedule of share-based compensation expense

Share-based compensation expense for the three and six months ended December 31, 2025 and 2024 is included under the following captions in the unaudited condensed consolidated statements of operations and comprehensive loss (in thousands):

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Three Months Ended

​

Six Months Ended

​

​

December 31,

​

December 31,

​

​ ​ ​

2025

​ ​ ​

2024

​

2025

​ ​ ​

2024

Research and development

​

$

1,578

​

$

721

​

$

2,745

​

$

1,433

General and administrative

​

1,833

​

724

​

3,197

​

1,412

Total

​

$

3,411

​

$

1,445

​

$

5,942

​

$

2,845

Legacy warrants

Share-Based Compensation and Warrants

Schedule of warrant activity

For the six months ended December 31, 2025, no Legacy Warrants were granted or exercised. The following table sets forth a summary of all Legacy Warrants for the six months ended December 31, 2025:

​

​	​	​	​	​	​	​	​
​	​ ​ ​	Shares	​ ​ ​	Price (1)		​ ​ ​	Term (2)
Outstanding, beginning of period		850,442	​	$	19.90		2.3
Expirations		(660)	​	​	67.55		​
Outstanding, end of period		849,782	​		19.86		1.8

(1) Represents the weighted average exercise price.

(2) Represents the weighted average remaining contractual term for the number of years until the warrants expire.

X

- Definition

The tabular disclosure of the number of shares authorized, outstanding, and available for future grants under stock option.

+ References

No definition available.

+ Details

Name:	rzlt_ShareBasedPaymentArrangementOptionSharesAuthorizedOutstandingAndAvailableForFutureGrants
Namespace Prefix:	rzlt_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=rzlt_LegacyWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: