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Equity (Tables)

12 Months Ended

Dec. 31, 2024

Schedule of initial carrying value

​

​	​	​
(in thousands)	​	Allocated Amount
Common Stock	$	2,391
Public Warrants	​	1,831
​	$	4,222
​	​	​

​

​	​	​
(in thousands)	​	Allocated Amount
Common Stock	$	865
Private Pre-Funded Warrants	​	1,214
Private Warrants	​	2,389
​	$	4,468
​	​	​

​

​	​	​
(in thousands)	​	Allocated Amount
Common Stock	$	1,447
Participation Right Pre-Funded Warrants	​	580
Participation Right Private Warrants	​	2,250
​	$	4,277
​	​	​

Schedule of public warrants and underwriter warrants

​

​	​	​
Stock price	$	0.79
Expected volatility	​	108.01%
Contractual/expected term (in years)	​	5.00
Risk-free interest rate	​	4.64%
Expected dividend yield	​	0%

​

​	​	​
Stock price	$	0.79
Expected volatility	​	108.01%
Contractual/expected term (in years)	​	5.00
Risk-free interest rate	​	4.64%
Expected dividend yield	​	0%

​

​	​	​
Stock price	$	0.65
Expected volatility	​	108.01%
Contractual/expected term (in years)	​	5.00
Risk-free interest rate	​	4.25%
Expected dividend yield	​	0%

Summary of warrants outstanding

​

​	​	​	​	​	​	​	​	​	​	​
​	​	Warrants					​	Pre-Funded Warrants(1)
(in thousands, except per share data)	​	Number	​	Wtd. Avg. Exercise Price	​	Wtd. Avg. Remaining Life (in years)	​	Number	​	Wtd. Avg. Exercise Price
Beginning Balance	​	—	​	—	​	—	​	—	​	—
Granted	​	21,319	$	1.0535	​	​	​	4,499	$	0.0001
Exercised	​	(24)	​	1.0500	​	​	​	—	​	—
Forfeited/Expired	​	—	​	—	​	​	​	—	​	—
Outstanding at Period End	​	21,295	$	1.0535	​	4.74	​	4,499	$	0.0001
​	​	​	​	​	​	​	​	​	​	​
(1) Pre-Funded warrants have no expiration date and only expire when exercised in full.

Schedule of outstanding, reserved and authorized shares under share-based compensation plans

​

​	​	​	​	​
​	​	December 31,	​	December 31,
(in thousands)		2024		2023
Outstanding options and restricted stock units		3,316		3,430
Reserved but unissued shares under the Plan	​	1,858	​	2,302
Reserved but unissued shares at end of period		5,174		5,732

Schedule of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	December 31,								​	December 31,
​	​	2024								​	2023
(in thousands, except per share data)	​	Options to Purchase Common Stock	​	Weighted Average Exercise Price		​	Weighted Average Remaining Contractual Life (in years)	​	Aggregate Intrinsic Value	​	Options to Purchase Common Stock	​	Weighted Average Exercise Price		​	Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Outstanding at beginning of year		2,759	​	$	2.07		5.38	​	180		2,779	​	$	2.05		6.43	​	—
Granted		—	​	$	—		​	​	—		—	​	$	—		​	​	—
Exercised		—	​	$	—		​	​	—		(20)	​	$	0.54		​	​	20
Forfeited/Expired		(307)	​	$	2.25		​	​	18		—	​	$	—		​	​	—
Outstanding at end of period		2,452	​	$	2.04		4.92	​	496		2,759	​	$	2.07		5.38	​	180
Exercisable at end of period		1,872	​	$	1.70		4.55	​	485		2,024	​	$	1.71		4.87	​	171

Schedule of restricted stock unit activity

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31,

​

December 31,

​

​

2024

​

2023

(in thousands, except per share data)

​

Number of Shares

​

Weighted Average Grant Date Fair Value

​

Weighted Average Contractual Life (in years) (1)

​

Number of Shares

​

Weighted Average Grant Date Fair Value

​

Weighted Average Remaining Contractual Life (in years) (1)

Nonvested at beginning of period

671

​

$

1.05

​

1.08

​

423

​

$

1.49

​

0.02

Granted

517

​

$

0.97

​

​

​

617

​

$

0.82

​

​

Vested

(323)

​

$

1.08

​

​

​

(361)

​

$

1.18

​

​

Forfeited

​

—

​

$

—

​

​

​

(8)

​

$

0.79

​

​

Nonvested at end of period

865

​

$

0.99

​

0.88

​

671

​

$

1.05

​

1.08

​

1) Weighted Average Contractual Life calculation excludes the number of director RSUs that vest upon one of four performance events (refer to discussion above for details).

Schedule of share-based compensation activity

​

​	​	​	​	​	​	​
​	​	December 31,
(in thousands)		2024			2023
Reserved but unissued shares at beginning of period	​	​	188	​	​	196
Increases in the number of authorized shares	​		116	​		7
Grants	​		(40)	​		(15)
Reserved but unissued shares at end of period	​		264	​		188

Restricted Stock Units

Schedule of compensation expense

​

​	​	​	​	​	​	​
​	​	For the Year Ended
​	​	December 31,
(in thousands, except per share data)	​	2024			2023
Share-based compensation expense	​	$	397	$	337	​
Weighted average value per share	​	$	1.27	$	0.83	​

Equity Incentive Plan

Schedule of awards to employees stock in lieu of cash payment for compensation

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

2024

​

2023

(in thousands, except per share data)

​

Number of Shares

Fair Value

​

Weighted Average per Share

​

Number of Shares

Fair Value

​

Weighted Average per Share

Share-based compensation

​

24

​

$

27

​

$

1.15

​

—

​

$

—

​

$

—

Fair value of stock payments in accrued compensation

​

307

​

$

326

​

$

1.06

​

296

​

$

234

​

$

0.79

Consultant Stock Plan

Schedule of compensation expense

​

​	​	​	​	​	​	​
​	​	For the Year Ended
​	​	December 31,
(in thousands, except per share data)		2024			2023
Share-based compensation expense	​	$	29	​	$	10
Weighted average value per share	​	$	0.75	​	$	0.69

​

Non-Qualified Stock Option

Schedule of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	December 31,								​	December 31,
​	​	2024								​	2023
(in thousands, except per share data)	​	Options to Purchase Common Stock	​	Weighted Average Exercise Price		​	Weighted Average Remaining Contractual Life (in years)	​	Aggregate Intrinsic Value	​	Options to Purchase Common Stock	​	Weighted Average Exercise Price		​	Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Outstanding at beginning of year		491	​	$	1.53		4.04	$	30		341	​	$	1.80		6.01	$	—
Granted		—	​	$	—		​	​	​		300	​	$	1.11		​	​	​
Exercised		—	​	$	—		​	​	​		(50)	​	$	1.31		​	​	​
Forfeited/Expired		—	​	$	—		​	​	​		(100)	​	$	1.31		​	​	​
Outstanding at end of period		491	​	$	1.53		3.04	$	119		491	​	$	1.53		4.04	$	30
Exercisable at end of period		441	​	$	1.60		3.29	$	93		391	​	$	1.69		4.61	$	10

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