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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2025

Stockholders' Equity

Schedule of weighted average assumptions

​

​	​	​	​	​	​	​	​
​		2025		2024		2023
Expected life (years)		N/A		N/A	​	1.0	​
Expected volatility		N/A	%	N/A	%	95	%
Dividend yield		N/A	%	N/A	%	—	%
Risk-free interest rate		N/A	%	N/A	%	4.7	%

Schedule of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​
​		Plan Shares		​		Weighted Average			​	​
​	​	Available	​	Plan Options	​	Exercise Price		​	Aggregate
​	​	for Grant		Outstanding		Per Share			Intrinsic Value
Balance at January 1, 2023		92,862		14,086	​	$	14.17	​	​	​
Cancelled or forfeited options		12,623		(12,623)	​		14.02	​
Balance at December 31, 2023		105,485		1,463	​		15.54	​
Restricted stock units and awards granted		(27,000)		—	​		5.64		​
Cancelled or forfeited options		1,463		(1,463)	​		15.54	​
Balance at December 31, 2024		79,948		—	​		—	​
Restricted stock units and awards granted		—		—	​		—		​
Balance at June 30, 2025		79,948		—	​		—	​

Schedule of restricted stock and restricted stock unit activity

​

​	​	​	​	​	​
​		​		Weighted average
​		Number of Shares		grant date fair value
Unvested shares at January 1, 2023		5,869	​	$	9.21
Granted		—	​		​
Vested		(5,869)	​		7.66
Unvested shares at December 31, 2023		—	​	$	—
Granted		27,000	​	​	5.64
Vested		—	​		—
Unvested shares at December 31, 2024		27,000	​	$	5.64
Granted		—	​	​	—
Vested		(9,000)	​		5.64
Unvested shares at June 30, 2025		18,000	​	$	5.64

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.

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-Name Accounting Standards Codification
-Section 50
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- 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.

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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.

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