CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Total revenue	$ 40,000	$ 26,544	$ 11,236
Operating expenses:
Research and development	38,594	25,312	29,191
General and administrative	39,787	29,393	14,302
Restructuring charge	11,764	5,528	0
Intangibles impairment charge	27,764	31,700	0
Change in fair value of contingent consideration	(52,000)	(56,840)	(11,180)
Total operating expenses	65,909	35,093	32,313
Loss from Operations	(25,909)	(8,549)	(21,077)
Interest income	1,854	17	224
Other income (expense), net	296	(77)	(99)
Loss Before Taxes	(23,759)	(8,609)	(20,952)
Benefit (provision) from income taxes	3,875	8,273	(1,445)
Net Loss After Taxes	(19,884)	(336)	(22,397)
Deemed Dividend	0	0	(147)
Net loss attributable to common stockholders - basic	(19,884)	(336)	(22,544)
Net loss attributable to common stockholders - diluted	$ (19,884)	$ (336)	$ (22,544)
Net loss per common share - basic (in dollars per share)	$ (0.10)	$ 0	$ (0.19)
Net loss per common share - diluted (in dollars per share)	$ (0.10)	$ 0	$ (0.19)
Weighted-average common shares outstanding - basic (in shares)	200,546	182,323	118,221
Weighted-average common shares outstanding for diluted (in shares)	200,546	182,323	118,221
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	License [Member]	License [Member]	License [Member]