Components of income tax provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Deferred (benefit) expense	$ (163)	$ 389	$ (1,600)
Income tax provision	3,539	4,267	2,453
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Federal	3,364	3,340	3,487
State	338	538	566
Current provision	3,702	3,878	4,053
Federal	(140)	327	(1,335)
State	(23)	62	(265)
Deferred (benefit) expense	(163)	389	(1,600)
Income tax provision	$ 3,539	$ 4,267	$ 2,453