CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Preferred stock	Common stock	Common stock Nonrelated Party	Common stock Related Party	Contributed capital	Contributed capital Nonrelated Party	Contributed capital Related Party	Accumulated deficit	Treasury stock	Accumulated other comprehensive loss
Beginning balance (in shares) at Dec. 31, 2022		3,955,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock with related party (in shares)		(3,955,000)			(396,000)
Ending balance (in shares) at Jun. 30, 2023		0
Beginning balance at Dec. 31, 2022		$ 4	$ 10			$ 630,428			$ (607,239)	$ (45,067)	$ (400)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock with related party		(4)
Ending balance at Jun. 30, 2023	$ (38,663)	$ 0	$ 14			663,812			(656,769)	(45,067)	(653)
Beginning balance (in shares) at Dec. 31, 2022			9,749,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)					488,000
Restricted stock awards released (in shares)			293,000
Issuance of shares to retire secured promissory note with related party ( in shares)					3,432,000
Ending balance (in shares) at Jun. 30, 2023			14,358,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock					$ 1		$ 3,996
Capital contribution from modification of securities purchase agreement with related party						1,805
Issuance of shares to retire secured promissory note with related party			$ 3			25,363
Issuance of shares to retire convertible notes						0
Equity-based compensation						2,177
Reclassification of common stock par value due to reverse stock split						43
Net loss	(49,530)								(49,530)
Net unrealized gain on debt securities available-for-sale	28										27
Foreign currency translation adjustment	(281)										(280)
Beginning balance (in shares) at Mar. 31, 2023		3,955,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock with related party (in shares)		(3,955,000)			(396,000)
Ending balance (in shares) at Jun. 30, 2023		0
Beginning balance at Mar. 31, 2023		$ 4	10			630,992			(624,034)	(45,067)	(631)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of preferred stock into common stock with related party		(4)
Ending balance at Jun. 30, 2023	(38,663)	$ 0	$ 14			663,812			(656,769)	(45,067)	(653)
Beginning balance (in shares) at Mar. 31, 2023			9,964,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)					488,000
Restricted stock awards released (in shares)			78,000
Issuance of shares to retire secured promissory note with related party ( in shares)					3,432,000
Ending balance (in shares) at Jun. 30, 2023			14,358,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock					$ 1		3,996
Capital contribution from modification of securities purchase agreement with related party						1,805
Issuance of shares to retire secured promissory note with related party			$ 3			25,363
Equity-based compensation						1,615
Reclassification of common stock par value due to reverse stock split						41
Net loss	(32,735)								(32,735)
Net unrealized gain on debt securities available-for-sale	4										3
Foreign currency translation adjustment	$ (26)										(25)
Beginning balance (in shares) at Dec. 31, 2023	0	0
Ending balance (in shares) at Jun. 30, 2024	0	0
Beginning balance at Dec. 31, 2023	$ (19,888)	$ 0	14			694,634			(668,857)	(45,067)	(612)
Ending balance at Jun. 30, 2024	$ (34,887)	$ 0	$ 24			705,280			(694,675)	(45,067)	(449)
Beginning balance (in shares) at Dec. 31, 2023	14,569,500		14,570,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				5,765,000	2,750,000
Restricted stock awards released (in shares)			585,000
Issuance of shares to retire convertible notes and derivative (in shares)			11,000
Ending balance (in shares) at Jun. 30, 2024	23,679,383		23,681,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock				$ 6	$ 3		4,370	$ 2,964
Restricted stock awards released			$ 1
Pre-funded warrants, net issuance costs						1,077
Issuance of shares to retire convertible notes						43
Equity-based compensation						2,192
Reclassification of common stock par value due to reverse stock split						0
Net loss	$ (25,818)								(25,818)
Net unrealized gain on debt securities available-for-sale	0										0
Foreign currency translation adjustment	$ 163										163
Beginning balance (in shares) at Mar. 31, 2024		0
Ending balance (in shares) at Jun. 30, 2024	0	0
Beginning balance at Mar. 31, 2024		$ 0	22			702,971			(683,087)	(45,067)	(618)
Ending balance at Jun. 30, 2024	$ (34,887)	$ 0	$ 24			705,280			(694,675)	$ (45,067)	(449)
Beginning balance (in shares) at Mar. 31, 2024			21,812,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)					1,561,000
Restricted stock awards released (in shares)			308,000
Ending balance (in shares) at Jun. 30, 2024	23,679,383		23,681,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock					$ 2		$ 0	$ 1,373
Pre-funded warrants, net issuance costs						0
Issuance of shares to retire convertible notes						0
Equity-based compensation						$ 936
Net loss	$ (11,588)								$ (11,588)
Net unrealized gain on debt securities available-for-sale	0
Foreign currency translation adjustment	$ 169										$ 169