UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Revenue from external customers	$ 8,847	$ 12,739	$ 29,782	$ 41,035
Revenue from related party	1,332	0	1,332	0
Total revenues	10,179	12,739	31,114	41,035
Costs and expenses:
Operating expenses (excluding depreciation and amortization)	5,418	29,466	31,330	63,939
Corporate general and administrative	2,696	2,679	9,925	12,568
Depreciation and amortization	233	518	793	3,177
Research and development	1,186	1,480	4,194	5,673
Loss (Gain) on disposal of long-lived assets	14	(37)	(55)	(92)
Impairment of goodwill	0	11,706	0	11,706
Impairment of fixed, long-lived and intangible assets	0	12,521	0	69,975
Total costs and expenses	9,547	58,333	46,187	166,946
Income (loss) from operations	632	(45,594)	(15,073)	(125,911)
Other (expense) income:
Paycheck protection plan loan forgiveness	0	0	881	0
Gain on lease termination	0	0	0	576
Interest expense	(18)	(19)	(53)	(40)
Other (expense) income, net	(102)	291	(62)	322
Total other (expense) income, net	(120)	272	766	858
Income (loss) before income taxes	512	(45,322)	(14,307)	(125,053)
Income tax (expense) benefit	(3)	81	(30)	6,282
Net income (loss)	$ 509	$ (45,241)	$ (14,337)	$ (118,771)
Income (loss) per common share:
Basic (in dollars per share)	$ 0.01	$ (0.66)	$ (0.21)	$ (1.75)
Diluted (in dollars per share)	$ 0.01	$ (0.66)	$ (0.21)	$ (1.75)
Weighted average common shares:
Weighted average common shares used in computing basic income (loss) per common share (in shares)	69,324	68,217	68,665	68,063
Weighted average common shares used in computing diluted income (loss) per common share (in shares)	70,176	68,217	68,665	68,063