Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues
Revenues, total	$ 374,839	$ 300,805	$ 254,883
Costs and expenses applicable to revenues
Cost and expenses applicable to revenues, total	160,498	144,450	120,477
Gross margin	214,341	156,355	134,406
Selling, general and administrative expenses	144,406	138,043	117,322
Research and development	10,110	5,300	6,944
Amortization of intangible assets	4,578	4,829	4,877
Credit loss expense (reversal), net	1,759	8,547	(3,951)
Asset impairments	144	4,470
Legal judgment and arbitration awards			(1,770)
Restructuring and executive transition costs	2,946
Income (Loss) from operations	50,398	(4,834)	10,984
Realized and unrealized investment gains	465	70	5,340
Retirement benefits non-service expense	(411)	(556)	(463)
Interest income	2,486	1,428	2,218
Interest expense	(6,821)	(5,877)	(7,092)
Income (loss) before taxes	46,117	(9,769)	10,987
Income tax expense	(13,051)	(10,108)	(20,564)
Net income (loss)	33,066	(19,877)	(9,577)
Net income attributable to non-controlling interests	(7,731)	(2,923)	(12,752)
Net income (loss) attributable to common shareholders	$ 25,335	$ (22,800)	$ (22,329)
Net income (loss) per share attributable to common shareholders - basic and diluted:
Net income (loss) per share - basic	$ 0.47	$ (0.4)	$ (0.38)
Net income (loss) per share - diluted	$ 0.46	$ (0.4)	$ (0.38)
Weighted average shares outstanding - basic	54,310	56,674	59,126
Weighted average shares outstanding - diluted	55,146	56,674	59,126
Technology Sales [Member]
Revenues
Revenues, total	$ 100,792	$ 69,158	$ 66,153
Costs and expenses applicable to revenues
Cost and expenses applicable to revenues, total	46,756	37,610	37,039
Image Enhancement and Maintenance Services [Member]
Revenues
Revenues, total	189,752	161,379	131,148
Costs and expenses applicable to revenues
Cost and expenses applicable to revenues, total	88,056	81,834	58,062
Technology Rentals [Member]
Revenues
Revenues, total	75,566	61,786	46,790
Costs and expenses applicable to revenues
Cost and expenses applicable to revenues, total	25,686	25,006	25,376
Finance Income [Member]
Revenues
Revenues, total	$ 8,729	$ 8,482	$ 10,792