Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Income (Loss) Per Share [Abstract]
Minimum percentage of class A common stock declared dividend excess over class B dividend	10.00%
Class A Common Stock [Member]
Numerator: [Abstract]
Allocation of net income (loss)	$ 3,788	$ (1,571)	$ 21,131
Denominator: [Abstract]
Weighted-average shares outstanding (in shares)	27,469	26,409	25,388
Basic earnings (loss) per share (in dollars per share)	$ 0.14	$ (0.06)	$ 0.83
Numerator: [Abstract]
Allocation of net income (loss)	$ 3,788	$ (1,571)	$ 21,131
Denominator: [Abstract]
Number of shares used in basic computation (in shares)	27,469	26,409	25,388
Weighted-average shares effect of dilutive securities [Abstract]
Director and employee stock options (in shares)	94	0	146
Number of shares used in diluted computation (in shares)	27,563	26,409	25,534
Diluted earnings (loss) per share (in dollars per share)	$ 0.14	$ (0.06)	$ 0.83
Class B Common Stock [Member]
Numerator: [Abstract]
Allocation of net income (loss)	$ 638	$ (388)	$ 4,123
Denominator: [Abstract]
Weighted-average shares outstanding (in shares)	5,577	5,577	5,577
Basic earnings (loss) per share (in dollars per share)	$ 0.11	$ (0.07)	$ 0.74
Numerator: [Abstract]
Allocation of net income (loss)	$ 638	$ (388)	$ 4,123
Denominator: [Abstract]
Number of shares used in basic computation (in shares)	5,577	5,577	5,577
Weighted-average shares effect of dilutive securities [Abstract]
Diluted earnings (loss) per share (in dollars per share)	$ 0.11	$ (0.07)	$ 0.74