CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT - USD ($) $ in Thousands	Total	Common Shares	Preferred Shares	Related Party	Cumulative impact of accounting change	Preferred Shares	Preferred Shares Preferred Shares	Common Shares	Common Shares Common Shares	Common Shares Preferred Shares	Common Shares Related Party	Contributed Capital	Contributed Capital Common Shares	Contributed Capital Preferred Shares	Contributed Capital Related Party	Contributed Capital Cumulative impact of accounting change	Accumulated Deficit	Accumulated Deficit Cumulative impact of accounting change	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2020						0
Beginning balance at Dec. 31, 2020	$ (62,864)					$ 0		$ 6				$ 475,072					$ (492,966)		$ (45,067)	$ 91
Beginning balance (in shares) at Dec. 31, 2020								5,761,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(77,702)																(77,702)
Issuance of stock (in shares)							3,955,000		494,000	(264,000)
Issuance of stock		$ 32,400	$ 30,450				$ 4						$ 32,400	$ 30,446
Cancellation of common stock	(20,297)											(20,297)
Exercise of options and restricted stock awards issued (in shares)								109,000
Exercise of options and restricted stock awards issued	1,619											1,619
Issuance of common stock under employee purchase plan (shares)								6,000
Issuance of common stock under employee purchase plan	326											326
Unrealized gain (loss) on investments	(34)																			(34)
Foreign currency translation adjustment	(117)																			(117)
Issuance of shares to retire Notes (in shares)								661,000
Issuance of shares to retire 2.50% Notes	38,897							$ 1				38,896
Equity-based compensation	22,190											22,190
Reclassification of common stock par value due to reverse stock split	61											61
Ending balance (in shares) at Dec. 31, 2021						3,955,000
Ending balance at Dec. 31, 2021	(35,071)				$ (11,516)	$ 4		$ 7				580,713				$ (37,438)	(570,668)	$ 25,922	(45,067)	(60)
Ending balance (in shares) at Dec. 31, 2021								6,767,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(62,493)																(62,493)
Issuance of stock (in shares)								1,750,000
Issuance of stock	$ 32,857							$ 2				32,855
Exercise of options and restricted stock awards issued (in shares)	610							130,000
Exercise of options and restricted stock awards issued	$ 6											6
Issuance of common stock under employee purchase plan (shares)								22,000
Issuance of common stock under employee purchase plan	224											224
Unrealized gain (loss) on investments	(14)																			(14)
Foreign currency translation adjustment	(326)																			(326)
Issuance of shares to retire Notes (in shares)								1,079,000
Issuance of shares to retire 2.50% Notes	10,170							$ 1				10,169
Capital contribution from related-party in connection with exchange transaction	29,847											29,847
Warrants issued to related party	3,753											3,753
Equity-based compensation	10,273											10,273
Reclassification of common stock par value due to reverse stock split	$ 26											26
Ending balance (in shares) at Dec. 31, 2022	3,954,546					3,955,000
Ending balance at Dec. 31, 2022	$ (22,264)					$ 4		$ 10				630,428					(607,239)		(45,067)	(400)
Ending balance (in shares) at Dec. 31, 2022	9,747,755							9,748,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (61,618)																(61,618)
Issuance of stock (in shares)											488,000
Issuance of stock				$ 3,997							$ 1				$ 3,996
Capital contribution from modification of securities purchase agreement with related party	1,805											1,805
Conversion of preferred stock into common stock with related party (in shares)						(3,955,000)		396,000
Conversion of preferred stock into common stock with related party	$ (4)					$ (4)
Restricted stock awards issued (in shares)								373,000
Exercise of options and restricted stock awards issued (in shares)	0
Unrealized gain (loss) on investments	$ 29																			29
Foreign currency translation adjustment	(241)																			(241)
Issuance of shares to retire secured promissory note with related party (in shares)								3,432,000
Issuance of shares to retire secured promissory note with related party	25,366							$ 3				25,363
Reclassification of derivative liability to contributed capital	26,908											26,908
Issuance of shares to retire Notes (in shares)								133,000
Issuance of shares to retire 2.50% Notes	819											819
Equity-based compensation	5,274											5,274
Reclassification of common stock par value due to reverse stock split	$ 41											41
Ending balance (in shares) at Dec. 31, 2023	0					0
Ending balance at Dec. 31, 2023	$ (19,888)					$ 0		$ 14				$ 694,634					$ (668,857)		$ (45,067)	$ (612)
Ending balance (in shares) at Dec. 31, 2023	14,569,500							14,570,000