Condensed Consolidated Statements of Stockholders' Deficit - USD ($) shares in Thousands, $ in Thousands	Total	The Mann Group L L C	Convertible Note The Mann Group L L C	Convertible Note Interest The Mann Group L L C	At-the-market Placement	Common Stock	Common Stock The Mann Group L L C	Common Stock Convertible Note The Mann Group L L C	Common Stock Convertible Note Interest The Mann Group L L C	Common Stock At-the-market Placement	Additional Paid-in Capital	Additional Paid-in Capital The Mann Group L L C	Additional Paid-in Capital Convertible Note The Mann Group L L C	Additional Paid-in Capital Convertible Note Interest The Mann Group L L C	Additional Paid-in Capital At-the-market Placement	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning Balance at Dec. 31, 2021	$ (209,349)					$ 2,515					$ 2,918,205						$ (3,130,069)
Beginning Balance (in shares) at Dec. 31, 2021						251,478
Net issuance of common stock associated with stock options and restricted stock units	129					$ 4					125
Net issuance of common stock associated with stock options and restricted stock units (in shares)						450
Issuance of common stock under the employee stock purchase plan	740					$ 2					738
Issuance of common stock under the employee stock purchase plan (in shares)						233
Stock-based compensation expense	2,806										2,806
Issuance of common stock from market price stock purchase plan	684					$ 3					681
Issuance of common stock from Market Price Stock Purchase Plan (in shares)						252
Cumulative gain (loss) on available-for-sale securities	(1,076)															$ (1,076)
Net Income (Loss)	(25,998)																(25,998)
Ending Balance at Mar. 31, 2022	(232,064)					$ 2,524					2,922,555					(1,076)	(3,156,067)
Ending Balance (in shares) at Mar. 31, 2022						252,413
Beginning Balance at Dec. 31, 2021	(209,349)					$ 2,515					2,918,205						(3,130,069)
Beginning Balance (in shares) at Dec. 31, 2021						251,478
Net Income (Loss)	(69,453)
Ending Balance at Sep. 30, 2022	(237,677)					$ 2,632					2,960,419					(1,206)	(3,199,522)
Ending Balance (in shares) at Sep. 30, 2022						263,156
Beginning Balance at Mar. 31, 2022	(232,064)					$ 2,524					2,922,555					(1,076)	(3,156,067)
Beginning Balance (in shares) at Mar. 31, 2022						252,413
Net issuance of common stock associated with stock options and restricted stock units	(377)					$ 8					(385)
Net issuance of common stock associated with stock options and restricted stock units (in shares)						833
Stock-based compensation expense	4,422										4,422
Issuance of common stock pursuant to conversion notes			$ 9,596	$ 520				$ 39	$ 2				$ 9,557	$ 518
Issuance of common stock pursuant to conversion notes (in shares)								3,838	193
Cumulative gain (loss) on available-for-sale securities	(130)															(130)
Net Income (Loss)	(29,023)																(29,023)
Ending Balance at Jun. 30, 2022	(247,056)					$ 2,573					2,936,667					(1,206)	(3,185,090)
Ending Balance (in shares) at Jun. 30, 2022						257,277
Net issuance of common stock associated with stock options and restricted stock units	(192)					$ 5					(197)
Net issuance of common stock associated with stock options and restricted stock units (in shares)						495
Issuance of common stock under the employee stock purchase plan	873					$ 3					870
Issuance of common stock under the employee stock purchase plan (in shares)						298
Stock-based compensation expense	3,622										3,622
Issuance of common stock pursuant to conversion notes		$ 99										$ 99
Issuance of common stock pursuant to conversion notes (in shares)							26
Issuance of common stock associated with at-the-market placement	19,790					$ 51					19,739
Issuance of common stock associated with at-the-market placement (in shares)						5,060
Issuance costs associated with at-the- market placement	(381)										(381)
Net Income (Loss)	(14,432)																(14,432)
Ending Balance at Sep. 30, 2022	(237,677)					$ 2,632					2,960,419					(1,206)	(3,199,522)
Ending Balance (in shares) at Sep. 30, 2022						263,156
Beginning Balance at Dec. 31, 2022	(250,538)					$ 2,638					2,964,293						(3,217,469)
Beginning Balance (in shares) at Dec. 31, 2022						263,793
Net issuance of common stock associated with stock options and restricted stock units	52					$ 2					50
Net issuance of common stock associated with stock options and restricted stock units (in shares)						206
Stock-based compensation expense	3,655										3,655
Issuance of common stock pursuant to conversion notes				55										55
Issuance of common stock pursuant to conversion notes (in shares)									11
Issuance of common stock associated with at-the-market placement					$ 1,199					$ 3					$ 1,196
Issuance of common stock associated with at-the-market placement (in shares)										269
Issuance costs associated with at-the- market placement	(24)										(24)
Net Income (Loss)	(9,795)																(9,795)
Ending Balance at Mar. 31, 2023	(255,396)					$ 2,643					2,969,225						(3,227,264)
Ending Balance (in shares) at Mar. 31, 2023						264,279
Beginning Balance at Dec. 31, 2022	(250,538)					$ 2,638					2,964,293						(3,217,469)
Beginning Balance (in shares) at Dec. 31, 2022						263,793
Net Income (Loss)	(13,339)
Ending Balance at Sep. 30, 2023	(251,779)					$ 2,695					2,975,891					443	(3,230,808)
Ending Balance (in shares) at Sep. 30, 2023						269,543
Beginning Balance at Mar. 31, 2023	(255,396)					$ 2,643					2,969,225						(3,227,264)
Beginning Balance (in shares) at Mar. 31, 2023						264,279
Net issuance of common stock associated with stock options and restricted stock units	(8,544)					$ 32					(8,576)
Net issuance of common stock associated with stock options and restricted stock units (in shares)						3,279
Issuance of common stock under the employee stock purchase plan	923					$ 3					920
Issuance of common stock under the employee stock purchase plan (in shares)						266
Stock-based compensation expense	5,580										5,580
Issuance of common stock pursuant to conversion notes				$ 54										$ 54
Issuance of common stock pursuant to conversion notes (in shares)									13
Issuance of common stock from market price stock purchase plan	152										152
Issuance of common stock from Market Price Stock Purchase Plan (in shares)						36
Cumulative gain (loss) on available-for-sale securities	443															443
Issuance of common stock associated with at-the-market placement					$ 1,583					$ 4					$ 1,579
Issuance of common stock associated with at-the-market placement (in shares)										362
Issuance costs associated with at-the- market placement	(17)										(17)
Net Income (Loss)	(5,265)																(5,265)
Ending Balance at Jun. 30, 2023	(260,487)					$ 2,682					2,968,917					443	(3,232,529)
Ending Balance (in shares) at Jun. 30, 2023						268,235
Net issuance of common stock associated with stock options and restricted stock units	(1,708)					$ 4					(1,712)
Net issuance of common stock associated with stock options and restricted stock units (in shares)						448
Stock-based compensation expense	4,601										4,601
Issuance of common stock pursuant to conversion notes		$ 56					$ 1					$ 55
Issuance of common stock pursuant to conversion notes (in shares)							13
Issuance of common stock associated with at-the-market placement	4,105					$ 8					4,097
Issuance of common stock associated with at-the-market placement (in shares)						847
Issuance costs associated with at-the- market placement	(67)										(67)
Net Income (Loss)	1,721																1,721
Ending Balance at Sep. 30, 2023	$ (251,779)					$ 2,695					$ 2,975,891					$ 443	$ (3,230,808)
Ending Balance (in shares) at Sep. 30, 2023						269,543