Goodwill and Other Intangible Assets - Other Intangible Assets, net (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	$ 2,113,000
Finite-Lived Intangible Asset, Expected Amortization, Year Two	2,735,000
Finite-Lived Intangible Asset, Expected Amortization, Year Three	1,155,000
Finite-Lived Intangible Asset, Expected Amortization, Year Four	764,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five	527,000
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	1,168,000
Finite-Lived Intangible Assets, Net	$ 8,462,000		$ 9,169,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 9 months 18 days
Finite-Lived Intangible Assets, Gross	$ 27,636,000		27,678,000
Finite-Lived Intangible Assets, Accumulated Amortization	(19,174,000)		(18,509,000)
Finite-Lived Intangible Assets, Net	8,462,000		9,169,000
Amortization of Intangible Assets	800,000	$ 200,000
Executive Search Member
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	522,000		599,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	522,000		599,000
Executive Search Member | Americas
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	103,000		103,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	103,000		103,000
Executive Search Member | Asia Pacific
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	30,000		33,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	30,000		33,000
Executive Search Member | Europe
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	389,000		463,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	389,000		463,000
On-Demand Talent
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	7,940,000		8,570,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	7,940,000		8,570,000
Customer Relationships [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	$ 5,361,000		5,632,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years 7 months 6 days
Finite-Lived Intangible Assets, Gross	$ 22,052,000		22,127,000
Finite-Lived Intangible Assets, Accumulated Amortization	(16,691,000)		(16,495,000)
Finite-Lived Intangible Assets, Net	5,361,000		5,632,000
Trade Names [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	$ 1,028,000		1,204,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 1 month 6 days
Finite-Lived Intangible Assets, Gross	$ 2,474,000		2,441,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,446,000)		(1,237,000)
Finite-Lived Intangible Assets, Net	1,028,000		1,204,000
Software and Software Development Costs
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	$ 2,073,000		2,333,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Finite-Lived Intangible Assets, Gross	$ 3,110,000		3,110,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,037,000)		(777,000)
Finite-Lived Intangible Assets, Net	$ 2,073,000		$ 2,333,000