CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND REDEEMABLE NONCONTROLLING INTEREST - USD ($)	Total	Parent	Common Stock	Additional Paid-In Capital	Retained Earnings	Other Cumulative Comprehensive Loss	Treasury Stock, at cost, and Company Stock Held for Deferred Compensation, at par
Beginning balances (in shares) at Dec. 31, 2021			19,920,829
Beginning balances (in shares) at Dec. 31, 2021							(570,415)
Beginning balances at Dec. 31, 2021		$ 360,525,000	$ 996,000	$ 294,515,000	$ 111,031,000	$ (26,538,000)	$ (19,479,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)		(3,288,000)			(3,288,000)
Change in cumulative foreign currency translation adjustment		(1,204,000)				(1,204,000)
Shares issued in connection with stock compensation plans (in shares)			163,443
Shares issued in connection with stock compensation plans			$ 8,000	(8,000)
Stock-based compensation	$ 102,000	2,267,000		2,267,000
Adjustment of redeemable noncontrolling interest	5,717,000	(5,717,000)			(5,717,000)
Treasury stock activity (in shares)							(16,773)
Treasury stock activity		(1,088,000)					$ (1,088,000)
Ending balances (in shares) at Mar. 31, 2022			20,084,272
Ending balances (in shares) at Mar. 31, 2022							(587,188)
Ending balances at Mar. 31, 2022		351,495,000	$ 1,004,000	296,774,000	102,026,000	(27,742,000)	$ (20,567,000)
Redeemable Non-Controlling interest, beginning balance at Dec. 31, 2021	197,196,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	(992,000)
Consideration adjustment related to redeemable noncontrolling interest	(427,000)
Stock-based compensation	102,000	2,267,000		2,267,000
Distribution to redeemable noncontrolling interest holder	(4,400,000)
Adjustment of redeemable noncontrolling interest	5,717,000	(5,717,000)			(5,717,000)
Redeemable Non-Controlling interest, ending balance at Mar. 31, 2022	197,196,000
Beginning balances (in shares) at Dec. 31, 2021			19,920,829
Beginning balances (in shares) at Dec. 31, 2021							(570,415)
Beginning balances at Dec. 31, 2021		360,525,000	$ 996,000	294,515,000	111,031,000	(26,538,000)	$ (19,479,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	2,179,000
Change in cumulative foreign currency translation adjustment	(3,791,000)
Ending balances (in shares) at Jun. 30, 2022			20,119,929
Ending balances (in shares) at Jun. 30, 2022							(597,758)
Ending balances at Jun. 30, 2022		355,055,000	$ 1,006,000	298,905,000	106,043,000	(30,329,000)	$ (20,570,000)
Redeemable Non-Controlling interest, beginning balance at Dec. 31, 2021	197,196,000
Redeemable Non-Controlling interest, ending balance at Jun. 30, 2022	197,196,000
Beginning balances (in shares) at Mar. 31, 2022			20,084,272
Beginning balances (in shares) at Mar. 31, 2022							(587,188)
Beginning balances at Mar. 31, 2022		351,495,000	$ 1,004,000	296,774,000	102,026,000	(27,742,000)	$ (20,567,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	6,459,000	5,552,000			5,552,000
Change in cumulative foreign currency translation adjustment	(2,587,000)	(2,587,000)				(2,587,000)
Shares issued in connection with stock compensation plans (in shares)			35,657
Shares issued in connection with stock compensation plans			$ 2,000	(2,000)
Stock-based compensation	158,000	2,133,000		2,133,000
Adjustment of redeemable noncontrolling interest	1,535,000	(1,535,000)			(1,535,000)
Treasury stock activity (in shares)							(10,570)
Treasury stock activity		(3,000)					$ (3,000)
Ending balances (in shares) at Jun. 30, 2022			20,119,929
Ending balances (in shares) at Jun. 30, 2022							(597,758)
Ending balances at Jun. 30, 2022		355,055,000	$ 1,006,000	298,905,000	106,043,000	(30,329,000)	$ (20,570,000)
Redeemable Non-Controlling interest, beginning balance at Mar. 31, 2022	197,196,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	907,000
Stock-based compensation	158,000	2,133,000		2,133,000
Distribution to redeemable noncontrolling interest holder	(2,600,000)
Adjustment of redeemable noncontrolling interest	1,535,000	(1,535,000)			(1,535,000)
Redeemable Non-Controlling interest, ending balance at Jun. 30, 2022	$ 197,196,000
Beginning balances (in shares) at Dec. 31, 2022			20,140,654
Beginning balances (in shares) at Dec. 31, 2022	(605,723)						(605,723)
Beginning balances at Dec. 31, 2022	$ 380,647,000	380,647,000	$ 1,007,000	303,893,000	125,215,000	(28,758,000)	$ (20,710,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)		909,000			909,000
Change in cumulative foreign currency translation adjustment		769,000				769,000
Shares issued in connection with stock compensation plans (in shares)			258,807
Shares issued in connection with stock compensation plans		0	$ 13,000	(13,000)
Stock-based compensation	232,000	4,795,000		4,795,000
Adjustment of redeemable noncontrolling interest	1,138,000	(1,138,000)			(1,138,000)
Treasury stock activity (in shares)							(77,184)
Treasury stock activity		(3,705,000)					$ (3,705,000)
Ending balances (in shares) at Mar. 31, 2023			20,399,461
Ending balances (in shares) at Mar. 31, 2023							(682,907)
Ending balances at Mar. 31, 2023		382,277,000	$ 1,020,000	308,675,000	124,986,000	(27,989,000)	$ (24,415,000)
Redeemable Non-Controlling interest, beginning balance at Dec. 31, 2022	187,522,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	1,230,000
Stock-based compensation	232,000	4,795,000		4,795,000
Distribution to redeemable noncontrolling interest holder	(2,600,000)
Adjustment of redeemable noncontrolling interest	1,138,000	(1,138,000)			(1,138,000)
Redeemable Non-Controlling interest, ending balance at Mar. 31, 2023	$ 187,522,000
Beginning balances (in shares) at Dec. 31, 2022			20,140,654
Beginning balances (in shares) at Dec. 31, 2022	(605,723)						(605,723)
Beginning balances at Dec. 31, 2022	$ 380,647,000	380,647,000	$ 1,007,000	303,893,000	125,215,000	(28,758,000)	$ (20,710,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	19,665,000
Change in cumulative foreign currency translation adjustment	$ 1,215,000
Ending balances (in shares) at Jun. 30, 2023			20,450,043
Ending balances (in shares) at Jun. 30, 2023	(685,542)						(685,542)
Ending balances at Jun. 30, 2023	$ 398,306,000	398,306,000	$ 1,022,000	310,455,000	138,801,000	(27,543,000)	$ (24,429,000)
Redeemable Non-Controlling interest, beginning balance at Dec. 31, 2022	187,522,000
Redeemable Non-Controlling interest, ending balance at Jun. 30, 2023	187,522,000
Beginning balances (in shares) at Mar. 31, 2023			20,399,461
Beginning balances (in shares) at Mar. 31, 2023							(682,907)
Beginning balances at Mar. 31, 2023		382,277,000	$ 1,020,000	308,675,000	124,986,000	(27,989,000)	$ (24,415,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	17,526,000	13,703,000			13,703,000
Change in cumulative foreign currency translation adjustment	446,000	446,000				446,000
Shares issued in connection with stock compensation plans (in shares)			50,582
Shares issued in connection with stock compensation plans		212,000	$ 2,000	210,000
Stock-based compensation	129,000	1,570,000		1,570,000
Adjustment of redeemable noncontrolling interest	$ (112,000)	112,000			112,000
Treasury stock activity (in shares)							(2,635)
Treasury stock activity		(14,000)					$ (14,000)
Ending balances (in shares) at Jun. 30, 2023			20,450,043
Ending balances (in shares) at Jun. 30, 2023	(685,542)						(685,542)
Ending balances at Jun. 30, 2023	$ 398,306,000	398,306,000	$ 1,022,000	310,455,000	138,801,000	$ (27,543,000)	$ (24,429,000)
Redeemable Non-Controlling interest, beginning balance at Mar. 31, 2023	187,522,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income	3,823,000
Stock-based compensation	129,000	1,570,000		$ 1,570,000
Distribution to redeemable noncontrolling interest holder	(3,840,000)
Adjustment of redeemable noncontrolling interest	(112,000)	$ 112,000			$ 112,000
Redeemable Non-Controlling interest, ending balance at Jun. 30, 2023	$ 187,522,000