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Award Timing Disclosure
 12 Months Ended
Dec. 31, 2025
Feb. 28, 2025
USD ($)
shares
$ / shares
Award Timing Disclosures [Line Items]    
Award Timing MNPI Disclosure
POLICIES AND PRACTICES RELATED TO THE GRANT OF CERTAIN EQUITY AWARDS CLOSE IN TIME TO THE RELEASE OF MATERIAL NONPUBLIC INFORMATION
From time to time, the Company grants stock options to its employees, including the Named Executive Officers. Historically, the Company has granted new-hire option awards on or soon after a new hire’s employment start date and annual refresh employee option grants in February each year, which refresh grants are typically approved at a meeting of the Compensation Committee occurring in February. The Company’s typical practice is to grant refresh employee stock options on the last business day of the month of February. Also, non-employee directors receive automatic grants of initial and annual stock option awards, at the time of a director’s initial appointment or election to the board and at the time of each annual meeting of the Company’s stockholders, respectively, pursuant to the Non-Employee Director Compensation Policy, as further described under the heading, “Compensation For Directors”. The Company does not otherwise maintain any written policies on the timing of awards of stock options, stock appreciation rights, or similar instruments with option-like features. Because stock option grant dates are generally determined by extrinsic events such as employee or director start dates or annual meeting dates or, in the case of annual refresh stock options, typically occur on the last business day of February, the Compensation Committee generally does not take material nonpublic information (MNPI) into account when determining the timing of awards and it does not seek to time the award of stock options in relation to the Company’s public disclosure of MNPI.
The following table provides information regarding each instance in 2025 when the Company awarded a stock option to a named executive officer in the period beginning four business days before the filing of a periodic report on Form 10-Q or Form 10-K, or the filing or furnishing of a current report on Form 8-K, and ending one business day after the filing or furnishing of such report. Each such instance is included without regard to the Company’s view as to whether the report disclosed MNPI.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Name
(a)
 
 
Grant date
(b)
 
 
Number of
securities
underlying
the award
(c)
 
 
Exercise
price of the
award ($/Sh)
(d)
 
 
Grant date
fair value of
the award
(e)
 
 
Percentage change in the
closing market price of the
securities underlying the
award between the trading
day ending immediately
prior to the disclosure of
material nonpublic
information and the trading
day beginning immediately
following the disclosure
of material nonpublic
information
(f)
David Hung, M.D.
 
 
2/28/25
 
 
2,000,000
 
 
$1.97
 
 
$1.34
 
 
6.88%
Colleen Sjogren
 
 
2/28/25
 
 
448,182
 
 
$1.97
 
 
$1.34
 
 
6.88%
Gary Hattersley, Ph.D.
 
 
2/28/25
 
 
448,182
 
 
$1.97
 
 
$1.34
 
 
6.88%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
Award Timing Method From time to time, the Company grants stock options to its employees, including the Named Executive Officers. Historically, the Company has granted new-hire option awards on or soon after a new hire’s employment start date and annual refresh employee option grants in February each year, which refresh grants are typically approved at a meeting of the Compensation Committee occurring in February. The Company’s typical practice is to grant refresh employee stock options on the last business day of the month of February. Also, non-employee directors receive automatic grants of initial and annual stock option awards, at the time of a director’s initial appointment or election to the board and at the time of each annual meeting of the Company’s stockholders, respectively, pursuant to the Non-Employee Director Compensation Policy, as further described under the heading, “Compensation For Directors”.  
Award Timing Predetermined true  
Award Timing MNPI Considered false  
Award Timing, How MNPI Considered The Company does not otherwise maintain any written policies on the timing of awards of stock options, stock appreciation rights, or similar instruments with option-like features. Because stock option grant dates are generally determined by extrinsic events such as employee or director start dates or annual meeting dates or, in the case of annual refresh stock options, typically occur on the last business day of February, the Compensation Committee generally does not take material nonpublic information (MNPI) into account when determining the timing of awards and it does not seek to time the award of stock options in relation to the Company’s public disclosure of MNPI.  
MNPI Disclosure Timed for Compensation Value false  
Awards Close in Time to MNPI Disclosures, Table
The following table provides information regarding each instance in 2025 when the Company awarded a stock option to a named executive officer in the period beginning four business days before the filing of a periodic report on Form 10-Q or Form 10-K, or the filing or furnishing of a current report on Form 8-K, and ending one business day after the filing or furnishing of such report. Each such instance is included without regard to the Company’s view as to whether the report disclosed MNPI.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Name
(a)
 
 
Grant date
(b)
 
 
Number of
securities
underlying
the award
(c)
 
 
Exercise
price of the
award ($/Sh)
(d)
 
 
Grant date
fair value of
the award
(e)
 
 
Percentage change in the
closing market price of the
securities underlying the
award between the trading
day ending immediately
prior to the disclosure of
material nonpublic
information and the trading
day beginning immediately
following the disclosure
of material nonpublic
information
(f)
David Hung, M.D.
 
 
2/28/25
 
 
2,000,000
 
 
$1.97
 
 
$1.34
 
 
6.88%
Colleen Sjogren
 
 
2/28/25
 
 
448,182
 
 
$1.97
 
 
$1.34
 
 
6.88%
Gary Hattersley, Ph.D.
 
 
2/28/25
 
 
448,182
 
 
$1.97
 
 
$1.34
 
 
6.88%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
David Hung, M.D. [Member]    
Awards Close in Time to MNPI Disclosures    
Name   David Hung, M.D.
Underlying Securities | shares   2,000,000
Exercise Price | $ / shares   $ 1.97
Fair Value as of Grant Date | $   $ 1.34
Underlying Security Market Price Change   0.0688
Colleen Sjogren [Member]    
Awards Close in Time to MNPI Disclosures    
Name   Colleen Sjogren
Underlying Securities | shares   448,182
Exercise Price | $ / shares   $ 1.97
Fair Value as of Grant Date | $   $ 1.34
Underlying Security Market Price Change   0.0688
Gary Hattersley, Ph.D. [Member]    
Awards Close in Time to MNPI Disclosures    
Name   Gary Hattersley, Ph.D.
Underlying Securities | shares   448,182
Exercise Price | $ / shares   $ 1.97
Fair Value as of Grant Date | $   $ 1.34
Underlying Security Market Price Change   0.0688