Restructuring (Tables)

12 Months Ended

Dec. 31, 2020

Restructuring And Related Activities [Abstract]

Schedule of Major Components of Restructuring Costs

The major components of our restructuring costs are summarized as follows (in thousands):

Components of Restructuring Costs	Restructuring Costs Incurred for the Year Ended December 31, 2019
Severance and other termination benefits	$	6,277
Stock-based compensation expense (a)		4,122
Accelerated depreciation		2,957
Total restructuring cost	$	13,356

(a) As a result of accelerated vesting of stock awards and the extension of exercise period of stock options

Schedule of Components of the Restructuring Liabilities

The outstanding restructuring liabilities are included in accrued liabilities on the consolidated balance sheets. As of December 31, 2020 and 2019, the components of the restructuring liabilities were as follows (in thousands):

	Severance and Other Termination Benefits
Balance at December 31, 2018	$	-
Severance and other termination benefits		6,277
Cash payments or settlements		(5,602	)
Balance at December 31, 2019	$	675
Cash payments or settlements		(675	)
Balance at December 31, 2020	$	-