Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Basis (loss) earnings per share:
Net (loss) income attributable to Common shareholders	$ (615)	$ 1,265	$ (1,314)	$ 2,065
Divided by:
Weighted average shares outstanding (in shares)	3,965,186	3,957,260	3,965,186	3,956,878
Basic earnings per common share (usd per share)	$ (0.16)	$ 0.32	$ (0.33)	$ 0.52
Diluted (loss) earnings per share:
Net (loss) income attributable to Common shareholders	$ (615)	$ 1,265	$ (1,314)	$ 2,065
Weighted average shares outstanding (in shares)	3,965,186	3,957,260	3,965,186	3,956,878
Effect of potentially dilutive restricted common shares (in shares)	0	9,819	0	8,395
Divided by:
Weighted average diluted shares outstanding (in shares)	3,965,186	3,967,079	3,965,186	3,965,273
Diluted earnings (loss) per share (usd per share)	$ (0.16)	$ 0.32	$ (0.33)	$ 0.52
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of potentially dilutive restricted common shares (in shares)	0	9,819	0	8,395
Restricted Stock
Diluted (loss) earnings per share:
Effect of potentially dilutive restricted common shares (in shares)	1,528		427
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of potentially dilutive restricted common shares (in shares)	1,528		427