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Fair Value on a Recurring Basis: (Tables)

3 Months Ended

Mar. 31, 2026

Fair Value on a Recurring Basis:

Schedule of liabilities that are measured at fair value on a recurring basis

​

​	​	​	​	​	​	​	​	​
​	​	​	​	March 31,		​	December 31,
Description	​ ​ ​	Level	​ ​ ​	2026		​ ​ ​	2025
Liabilities:		​		​	​		​	​
Warrant liability (Note 6)		3	​	$	15,000	​	$	9,000
Derivative liability (Note 6)		3	​	$	3,764,000	​	$	2,114,000

Warrant liability | Series B Warrants

Fair Value on a Recurring Basis:

Summary of the change in the fair value of the liabilities that is measured at fair value on a recurring basis

​

​	​	​	​
Balance on December 31, 2025	​ ​ ​	$	9,000
Change in fair value of warrant liabilities	​		6,000
Balance on March 31, 2026	​	$	15,000

Warrant liability | Series C Warrants | Series D Convertible Preferred Stock

Fair Value on a Recurring Basis:

Summary of the change in the fair value of the liabilities that is measured at fair value on a recurring basis

​

​	​	​	​
Balance on December 31, 2025	​ ​ ​	$	2,000
Change in fair value of derivative liability Series D Convertible Preferred Stock	​	​	(1,000)
Balance on March 31, 2026	​	$	1,000

Derivative liability | Series E Convertible Preferred Stock

Fair Value on a Recurring Basis:

Summary of the change in the fair value of the liabilities that is measured at fair value on a recurring basis

​

​	​	​	​
Balance on December 31, 2025	​ ​ ​	$	2,112,000
Change in fair value of derivative liability Series E Convertible Preferred Stock	​		1,651,000
Balance on March 31, 2026	​	$	3,763,000

​

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Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

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