Other expense (Tables)

12 Months Ended

Dec. 31, 2020

Other expense

Schedule of other expense

Other expense consist of the following:

	Year ended
	December 31,
	2020		2019
Gain (loss) on disposal of  assets (Note 9)	$	3,288	$	(177)
Restructuring charges		—		(2,323)
Loss on termination of purchase agreement		—		(1,319)
Impairment of intangible assets (Note 10)		(23,659)		—
Gain on non-substantial debt modification (Note 11)		2,269		—
Other income		1,419		562
Total other expense, net	$	(16,683)	$	(3,257)