Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Allowances for doubtful accounts	$ 799	$ 631
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	75,000,000	75,000,000
Common Stock, Shares, Issued	21,645,193	21,386,382
Treasury stock at cost	1,112,502	1,050,448