Segment Reporting (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue From External Sources									$ 69,389,000	$ 73,393,000	$ 64,765,000
Net intersegment revenues									0	0	0
Interest and Dividend Income, Operating											35,000
Net interest and dividend revenue									266,000	868,000	604,000
Other revenue									(708,000)	(339,000)	311,000
Total revenues	$ 20,456,000	$ 15,406,000	$ 15,603,000	$ 17,216,000	$ 19,391,000	$ 17,860,000	$ 17,484,000	$ 18,319,000	68,681,000	73,054,000	65,111,000
Expenses:
Depreciation and amortization									2,576,000	2,396,000	2,642,000
Goodwill impairment loss									0	3,400,000	3,403,000
Other operating expenses									70,978,000	64,699,000	62,513,000
Total expenses									73,554,000	67,095,000	68,558,000
Realized Investment Gains (Losses)									0	8,371,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal											(711,000)
Income (loss) before income taxes	(4,313,000)	(1,021,000)	(458,000)	594,000	3,213,000	2,360,000	1,416,000	7,014,000	(5,195,000)	14,003,000	(7,588,000)
Income tax expense (benefit)									(567,000)	4,240,000	1,359,000
Net loss	(3,125,000)	$ (1,175,000)	$ (378,000)	$ 50,000	2,813,000	$ 1,879,000	$ 970,000	$ 4,101,000	(4,628,000)	9,763,000	(8,947,000)
Restricted stock expense									6,001,000	5,835,000	6,701,000
Amortization of intangible assets									1,889,000	1,624,000	1,721,000
Deferred taxes on goodwill									(841,000)	0
Assets	146,427,000				139,605,000				146,427,000	139,605,000	149,152,000
Segment goodwill	35,732,000				16,401,000				35,732,000	16,401,000	16,401,000
Expenditures for long-lived assets									320,000	178,000	93,000
Unrealized Gain (Loss) on Investments									(1,495,000)	(1,797,000)	(711,000)
Investment Income, Investment Expense									266,000	868,000	604,000
Other Income									907,000	602,000	135,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax											4,169,000
General and Administrative Expense [Member]
Expenses:
Amortization of intangible assets									1,900,000	1,600,000	1,700,000
Operating Segments | Advisory [Member]
Segment Reporting Information [Line Items]
Revenue From External Sources									47,703,000	49,262,000	40,836,000
Net intersegment revenues									2,080,000	2,415,000	2,338,000
Interest and Dividend Income, Operating											35,000
Other revenue									(708,000)	(339,000)	311,000
Total revenues									49,075,000	51,338,000	43,520,000
Expenses:
Depreciation and amortization									394,000	167,000	322,000
Goodwill impairment loss											3,403,000
Other operating expenses									33,249,000	33,249,000	34,675,000
Total expenses									33,643,000	33,416,000	38,400,000
Realized Investment Gains (Losses)										3,524,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal											(311,000)
Income (loss) before income taxes									15,102,000	21,564,000	5,361,000
Income tax expense (benefit)									4,040,000	4,784,000	3,456,000
Net loss									11,062,000	16,780,000	1,905,000
Assets	283,027,000				222,335,000				283,027,000	222,335,000	204,827,000
Segment goodwill	19,331,000				0				19,331,000	0	0
Expenditures for long-lived assets									137,000	66,000	20,000
Unrealized Gain (Loss) on Investments									(640,000)	(757,000)
Investment Income, Investment Expense									310,000	875,000	552,000
Other Income									0	0	0
Operating Segments | Trust [Member]
Segment Reporting Information [Line Items]
Revenue From External Sources									21,686,000	24,131,000	23,929,000
Net intersegment revenues									336,000	356,000	263,000
Net interest and dividend revenue											0
Other revenue									0	0	0
Total revenues									22,022,000	24,487,000	24,192,000
Expenses:
Depreciation and amortization									1,603,000	1,614,000	1,656,000
Goodwill impairment loss											0
Other operating expenses									18,336,000	18,092,000	17,398,000
Total expenses									19,939,000	19,706,000	19,054,000
Realized Investment Gains (Losses)										2,731,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal											(222,000)
Income (loss) before income taxes									1,579,000	6,918,000	4,968,000
Income tax expense (benefit)									574,000	1,262,000	1,977,000
Net loss									1,005,000	5,656,000	2,991,000
Assets	53,644,000				56,965,000				53,644,000	56,965,000	54,749,000
Segment goodwill	16,401,000				16,401,000				16,401,000	16,401,000	16,401,000
Expenditures for long-lived assets									84,000	61,000	24,000
Unrealized Gain (Loss) on Investments									(460,000)	(587,000)
Investment Income, Investment Expense									(44,000)	(7,000)	52,000
Other Income									0	0	0
Westwood Holdings
Segment Reporting Information [Line Items]
Revenue From External Sources									0	0	0
Net intersegment revenues									0	0	0
Net interest and dividend revenue											0
Other revenue									0	0	0
Total revenues									0	0	0
Expenses:
Depreciation and amortization									579,000	615,000	664,000
Goodwill impairment loss											0
Other operating expenses									21,809,000	16,129,000	13,041,000
Total expenses									22,388,000	16,744,000	13,705,000
Realized Investment Gains (Losses)										2,116,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal											(178,000)
Income (loss) before income taxes									(21,876,000)	(14,479,000)	(17,917,000)
Income tax expense (benefit)									(5,181,000)	(1,806,000)	(4,074,000)
Net loss									(16,695,000)	(12,673,000)	(13,843,000)
Assets	30,308,000				12,784,000				30,308,000	12,784,000	17,247,000
Segment goodwill	0				0				0	0	0
Expenditures for long-lived assets									99,000	51,000	49,000
Unrealized Gain (Loss) on Investments									(395,000)	(453,000)
Investment Income, Investment Expense									0	0	0
Other Income									907,000	602,000	135,000
Eliminations
Segment Reporting Information [Line Items]
Revenue From External Sources									0	0	0
Net intersegment revenues									(2,416,000)	(2,771,000)	(2,601,000)
Net interest and dividend revenue											0
Other revenue									0		0
Total revenues									(2,416,000)	(2,771,000)	(2,601,000)
Expenses:
Depreciation and amortization									0	0	0
Goodwill impairment loss											0
Other operating expenses									(2,416,000)	(2,771,000)	(2,601,000)
Total expenses									(2,416,000)	(2,771,000)	(2,601,000)
Realized Investment Gains (Losses)										0
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal											0
Income (loss) before income taxes									0	0	0
Income tax expense (benefit)									0	0	0
Net loss									0	0	0
Assets	(220,552,000)				(152,479,000)				(220,552,000)	(152,479,000)	(127,671,000)
Segment goodwill	$ 0				$ 0				0	0	0
Expenditures for long-lived assets									0	0	0
Unrealized Gain (Loss) on Investments									0	0
Investment Income, Investment Expense									0	0	0
Other Income									$ 0	$ 0	$ 0