Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 0	$ 144	$ 0	$ 144
Cost of sales	(2)	(1)	(8)	(1)
Gross margin	(2)	143	(8)	143
Selling, general and administrative expenses	1,678	2,024	5,263	6,152
Total operating expenses	1,678	2,024	5,263	6,152
Other income	28	19	84	213
Interest expense	(95)	(70)	(229)	(185)
Change in fair value of contingent payment obligations	1,345	(172)	948	(2,996)
Total interest and other	1,278	(223)	803	(2,968)
Net loss	(402)	(2,104)	(4,468)	(8,977)
Other comprehensive income, net of tax	0	0	0	0
Comprehensive loss	$ (402)	$ (2,104)	$ (4,468)	$ (8,977)
Basic and diluted net loss per common share (in dollars per share)	$ (0.01)	$ (0.03)	$ (0.06)	$ (0.13)
Weighted average common shares outstanding (in shares)	78,542	73,868	78,025	69,869