Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances at Dec. 31, 2022	$ 15	$ 844,373	$ (645,496)	$ 9	$ 198,901
Balances, shares at Dec. 31, 2022	14,892,129
Issuance of common stock in Registered Direct Offering, net of offering expenses	$ 2	1,320			1,322
Issuance of common stock in Registered Direct Offering, net of offering expenses, shares	1,780,220
Common stock issued pursuant to short-term debt maturity extension		712			712
Common stock issued pursuant to short-term debt maturity extension, shares	270,731
Exercise of stock options		304			304
Exercise of stock options, shares	108,637
Fair value of warrant modification for professional services		403			403
Issuance of common stock for stem-cells to be used in research and development		1,000			1,000
Issuance of common stock for stem-cells to be used in research and development, shares	169,492
Issuance of warrants to RWI and C.V. Starr		2,290			2,290
Common stock issued pursuant to short-term debt conversion	$ 1	4,598		(155)	4,444
Common stock issued pursuant to short-term debt conversion, shares	559,481
Vesting of restricted stock units					0
Vesting of restricted stock units, shares	83,759
Tax withholding on vesting of restricted stock units		(101)			(101)
Tax withholding on vesting of restricted stock units, shares	(19,130)
Stock-based compensation expense		15,017			15,017
Issuance of common stock in PIPE Offering, net of offering expenses	$ 1	12,680			12,681
Issuance of common stock in PIPE Offering, net of offering expenses, shares	1,519,579
Issuance of common stock under ATM Agreement		136			136
Issuance of common stock under ATM Agreement, shares	13,296
Change in fair value of debt due to change in credit risk, net of tax				146	146
Net loss			(196,295)		(196,295)
Balances at Dec. 31, 2023	$ 19	882,732	(841,791)		40,960
Balances, shares at Dec. 31, 2023	19,378,192
Exercise of stock options		58			58
Exercise of stock options, shares	20,744
Common stock issued pursuant to short-term debt conversion		1,700			1,700
Common stock issued pursuant to short-term debt conversion, shares	478,881
Vesting of restricted stock units
Vesting of restricted stock units, shares	401,013
Tax withholding on vesting of restricted stock units		(434)			(434)
Tax withholding on vesting of restricted stock units, shares	(109,790)
Stock-based compensation expense		11,569			11,569
Change in fair value of debt due to change in credit risk, net of tax				(5)	(5)
Net loss			(57,892)		(57,892)
Issuance of common stock and warrants in PIPE Offering, net of offering expenses		6,000			6,000
Issuance of common stock and warrants in PIPE Offering, net of offering expenses, shares	2,141,098
Issuance of common stock to Yorkville for debt extension and SEPA commitment fee		317			317
Issuance of common stock to Yorkville for debt extension and SEPA commitment fee, shares	116,964
Issuance and modification of warrants to RWI and C.V. Starr		3,261			3,261
Retirement of shares in connection with reverse stock split	$ (17)	17
Retirement of shares in connection with reverse stock split, shares	(191)
Issuance of common stock to Palantir as consideration for settlement agreement		175			175
Issuance of common stock to Palantir as consideration for settlement agreement, shares	60,584
Reclassification of warrants from liability classified to equity classified		2,970			2,970
Issuance of common stock as compensation expense		158			158
Issuance of common stock as compensation expense, shares	59,176
Balances at Dec. 31, 2024	$ 2	$ 908,523	$ (899,683)	$ (5)	$ 8,837
Balances, shares at Dec. 31, 2024	22,546,671