Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Allowance of accounts receivable	$ 1,071	$ 618
Accumulated amortization	$ 16,257	$ 15,984
Preferred stock, shares authorized (in shares)	1,500	1,500
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury stock, shares (in shares)	1,764	1,754
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	35,000	35,000
Common stock, shares issued (in shares)	8,183	8,007