Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Receivables, allowance for credit losses	$ 150	$ 24
Preferred stock, percentage non-cumulative (as a percent)	5.00%	5.00%
Preferred stock, par value (in USD per share)	$ 10	$ 10
Preferred stock, shares authorized (in shares)	1,000	1,000
Preferred stock, shares issued (in shares)	437	437
Preferred stock, shares outstanding (in shares)	437	437
Common stock, par value (in US dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	23,125,166	18,115,965
Common stock, shares outstanding (in shares)	21,963,574	16,915,862
Treasury stock (in shares)	1,161,592	1,200,103