Restructuring Costs (Tables)

12 Months Ended

Dec. 31, 2019

Restructuring Costs

Summary of accrued restructuring costs, included as a component of accrued liabilities

	December 31, 2018		Charges		Payments		December 31, 2019
Accrued retention bonus		638		—		(638)		—
Total	$	638	$	—	$	(638)	$	—