Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Trade accounts receivable, allowances for doubtful accounts	$ 377	$ 289
Patents, trademarks, and other intangible assets, accumulated amortization	$ 45,020	$ 44,323
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	130,829,770	130,075,838
Treasury stock, shares held	3,138,675	3,138,675