Consolidated Balance Sheets (Parenthetical) $ in Thousands	Dec. 31, 2021 USD ($) shares	Dec. 31, 2021 € / shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2020 € / shares
Current assets:
Accounts receivable, allowance | $	$ 368		$ 93
Shareholders' Equity:
Common stock, nominal value (in Euro per share) | € / shares		€ 1.00		€ 1.00
Common stock, issued (in shares)	2,661,386		2,661,386
Common stock, outstanding (in shares)	2,617,397		2,605,689
Treasury stock, shares (in shares)	43,989		55,697