Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (6,579)	$ (4,187)	$ (17,909)	$ (15,283)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(85)	(12)	(30)	(2)
Other comprehensive loss, net of tax	(85)	(12)	(30)	(2)
Comprehensive loss	$ (6,664)	$ (4,199)	$ (17,939)	$ (15,285)