components of the income tax provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Deferred (benefit) expense	$ (1,600)	$ (391)	$ (494)
Income tax provision	2,453	2,359	1,709
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Federal	3,487	2,406	1,986
State	566	344	217
Current provision	4,053	2,750	2,203
Federal	(1,335)	(317)	(455)
State	(265)	(74)	(39)
Deferred (benefit) expense	(1,600)	(391)	(494)
Income tax provision	$ 2,453	$ 2,359	$ 1,709