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TEMPORARY REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (Tables)
12 Months Ended
Dec. 31, 2025
TEMPORARY REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY  
Schedule of common stock reserved for issuance

The Company has reserved shares of common stock for issuance as follows as of the periods indicated:

December 31, 

December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

Warrants

107,813

93,750

Awards outstanding under the 2017 and 2007 Equity Incentive Plans

5,853,656

5,984,204

Awards outstanding under the 2024 Equity Plan

895,434

Shares available for future issuance under the convertible debt note

5,308,221

Shares available for future issuance under equity line-of-credit agreement

17,859

Shares available for future issuance under the 2024 Equity Incentive Plan

1,481,815

2,708,175

Shares authorized and available for future issuance

53,981,656

68,364,493

Total shares reserved and available for future issuance of common stock

67,646,454

77,150,622

Schedule of temporary redeemable preferred stock

As of December 31, 2025 and 2024, the Company was authorized to issue 5,000,000 shares of preferred stock with no shares of preferred stock designated or outstanding. As of December 31, 2023, the Company was authorized to issue 4,014,946 shares of preferred stock with a par value of $0.00001 per share, of which 3,874,946 shares were designated as Series A preferred stock and 140,000 shares were designated as NCNV preferred shares. Activity for both the Series A and NCNV preferred stock for the year ended December 31, 2024 was as follows (in thousands, except share data):

Series A Preferred Stock

  ​ ​ ​

Shares

  ​ ​ ​

Amount

  ​ ​ ​

Balance at December 31, 2023:

 

3,874,946

$

3,000

 

Conversion of Series A Temporary Preferred Stock into common stock

(3,874,946)

(3,000)

Balance at December 31, 2024:

 

$

 

Balance at December 31, 2025:

$

As part of the Recapitalization and discussed below, shares of NCNV 1 and NCNV 3 preferred stock were issued in December 2023. No amounts of NCNV 1, NCNV 2, or NCNV 3 preferred stock were previously outstanding.

NCNV Preferred

NCNV Preferred

NCNV Preferred

Stock 1

Stock 2

Stock 3

  ​ ​ ​

Shares

  ​ ​ ​

Amount

  ​ ​ ​

Shares

  ​ ​ ​

Amount

  ​ ​ ​

Shares

  ​ ​ ​

Amount

Balance at December 31, 2023

 

55,312

$

55,312

 

$

48,640

$

48,640

Cancellation of NCNV 1 Preferred Stock

(562)

(562)

Issuance of NCNV 2 Preferred Stock in exchange for Debt Forgiveness

5,752

5,752

Reduction of the original issue price from $1,000 to $600 per share

(21,900)

(2,301)

(19,455)

Conversion of NCNV 1, 2 and 3 Preferred Stock into common stock

(54,750)

(32,850)

(5,752)

(3,451)

(48,640)

(29,185)

Balance at December 31, 2024:

 

$

 

$

$

Balance at December 31, 2025:

$

$

$