v3.26.1
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2026
Stock-Based Compensation  
Schedule of stock option activity

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Number of

​

Weighted average

​

​

  ​

shares

  ​

price per share

  ​

​

​

​

​

​

​

​

Outstanding as of January 1, 2026

 

352

​

$

202.81

​

Granted

​

119

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$

2.01

​

Forfeited

​

(1)

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$

143.42

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Cancelled

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(3)

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$

387.85

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Exercised

​

—

​

$

—

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Outstanding as of June 30, 2026

​

467

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$

150.78

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​

​

​

​

​

​

​

Options vested and exercisable as of June 30, 2026

 

332

​

$

206.82

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Schedule of stock-based compensation charges

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Three months ended June 30, 

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Six months ended June 30, 

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2026

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2025

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2026

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2025

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Research and development

  ​ ​ ​

$

51

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$

648

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$

130

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$

134

Selling, general and administrative

​

 

307

​

​

908

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663

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​

1,602

Total

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$

358

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$

1,556

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$

793

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$

1,736

BTI RSU  
Stock-Based Compensation  
Schedule of activity relating to RSUs

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Number of

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  ​

shares

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​

​

Outstanding as of January 1, 2026

 

107

Granted

​

409

Cancelled

​

(3)

Vested

​

(205)

Outstanding as of June 30, 2026

​

308

OnkosXcel PSU  
Stock-Based Compensation  
Schedule of activity relating to PSUs

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​

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Weighted average

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Number of

​

price per unit

​

  ​

units

​

(in whole dollars)

​

​

​

​

​

​

Outstanding as of January 1, 2026

 

1,072

​

$

5,663

Granted

​

—

​

$

—

Cancelled

​

—

​

$

—

Forfeited

​

—

​

$

—

Outstanding as of June 30, 2026

​

1,072

​

​

​

​

​

​

​

​

​

Vested units as of June 30, 2026

​

1,061

​

$

5,611

Schedule of Valuation Assumptions

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2024 grant profit share unit valuation inputs

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Expected volatility

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97.4

%

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Risk-free rate of interest

​

3.6

%

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Expected dividend yield

​

—

%

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Expected term

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5.8

years

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OnkosXcel RSUs  
Stock-Based Compensation  
Schedule of activity relating to RSUs

​

​

​

​

​

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​

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Number of

​

  ​

units

​

​

​

Outstanding as of January 1, 2026

 

135

Granted

​

—

Vested

​

(4)

Cancelled

​

—

Outstanding as of June 30, 2026

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131

​

​

​

Employee Stock Option  
Stock-Based Compensation  
Schedule of Valuation Assumptions

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Six months ended

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Six months ended

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  ​ ​ ​

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June 30, 2026

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June 30, 2025

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Expected term

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5.5

years

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​

​

​

5.3

years

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Expected stock price volatility

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​

​

​

122.0

%

​

​

​

​

112.0

%

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Risk-free rate of interest

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​

​

​

3.8

%

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​

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4.5

%

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Expected dividend yield

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​

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0.0

%

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​

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0.0

%

​