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The grant-date fair value of options granted during the reporting period .

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COMMON STOCK OFFERING, RESTRICTED STOCK UNITS, STOCK OPTIONS AND WARRANTS - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended		6 Months Ended
	Mar. 04, 2024	Feb. 23, 2023	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock reacquired and retired (shares)			0	0	0	0
Performance Units
Stock-based compensation expense			$ 2,873	$ 2,405	$ 5,575	$ 4,963
Restricted Stock Units
Stock-based compensation expense			$ 2,873	2,405	$ 5,575	4,963
Warrants
Warrants outstanding (shares)			3,400		3,400
Exercise price of warrants (in dollars per share)			$ 5.64		$ 5.64
PSUs
Performance Units
Stock-based compensation expense			$ 400	200	$ 800	800
Compensation costs not yet recognized of nonvested awards			1,900		$ 1,900
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years
Restricted Stock Units
Stock-based compensation expense			400	200	$ 800	800
Compensation costs not yet recognized of nonvested awards			1,900		$ 1,900
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years
Stock Options
Award vesting rights (percentage)					33.33%
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years
Stock options
Performance Units
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years 2 months 12 days
Restricted Stock Units
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years 2 months 12 days
Stock Options
Stock options granted in period (shares)					900
Fair value of stock options granted					$ 1,900
Weighted-average grant date fair value per share of options granted in period (in dollars per share)					$ 2.16
Unrecognized compensation costs			6,000		$ 6,000		$ 5,700
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years 2 months 12 days
2013 Plan
Stock Plans
Stock available for grant newly authorized by Board of Directors (shares)		3,600			3,645
Performance Units
Performance units (shares)					1,671
Restricted Stock Units
Restricted stock units granted in period (shares)					1,671
Stock Options
Stock options granted in period (shares)					867
2013 Plan \| RSUs
Performance Units
Performance units (shares)					1,100
Share price of common stock on date of grant of RSUs (in dollars per share)					$ 3.41
Stock-based compensation expense			1,500	1,400	$ 2,900	2,600
Compensation costs not yet recognized of nonvested awards			9,800		$ 9,800
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years 2 months 12 days
Restricted Stock Units
Restricted stock units granted in period (shares)					1,100
Share price of common stock on date of grant of RSUs (in dollars per share)					$ 3.41
Aggregate fair value of shares underlying RSU's					$ 3,700
Stock-based compensation expense			1,500	$ 1,400	2,900	$ 2,600
Compensation costs not yet recognized of nonvested awards			$ 9,800		$ 9,800
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years 2 months 12 days
Stock Options
Period for recognition of compensation costs not yet recognized related to nonvested awards					2 years 2 months 12 days
2025 LTI Plan \| PSUs
Performance Units
Performance units (shares)	600
Share price of common stock on date of grant of RSUs (in dollars per share)	$ 3.48
Restricted Stock Units
Restricted stock units granted in period (shares)	600
Share price of common stock on date of grant of RSUs (in dollars per share)	$ 3.48
2024 LTI Plan \| PSUs
Performance Units
Ultimate number of PSU's that may vest as a percentage of the target PSUs (percent)			28.00%		28.00%
2023 LTI Plan \| PSUs
Performance Units
Ultimate number of PSU's that may vest as a percentage of the target PSUs (percent)			151.00%		151.00%
Stock Plans \| Stock options
Stock Options
Term of vested options (years)					10 years
Vesting tranche one \| PSUs
Performance Units
Vesting eligibility (percent)			50.00%		50.00%
Vesting tranche one \| 2013 Plan \| Stock options
Stock Options
Award vesting rights (percentage)					33.33%
Vesting tranche two \| PSUs
Performance Units
Vesting eligibility (percent)			50.00%		50.00%
Vesting tranche two \| 2013 Plan \| Stock options
Stock Options
Award vesting rights (percentage)					33.33%
Vesting tranche three \| 2013 Plan \| Stock options
Stock Options
Award vesting rights (percentage)					33.33%
Minimum \| 2013 Plan \| RSUs
Restricted Stock Units
Award vesting period					12 months
Minimum \| 2025 LTI Plan \| PSUs
Performance Units
Ultimate number of PSU's that may vest as a percentage of the target PSUs (percent)			0.00%		0.00%
Maximum \| 2013 Plan \| RSUs
Restricted Stock Units
Award vesting period					36 months
Maximum \| 2025 LTI Plan \| PSUs
Performance Units
Ultimate number of PSU's that may vest as a percentage of the target PSUs (percent)			200.00%		200.00%