Note 3 - Supplemental Balance Sheet Information (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2018	Dec. 31, 2011
Depreciation, Amortization and Accretion, Net	$ 2,000	$ 2,000
Goodwill, Impaired, Accumulated Impairment Loss	0	2,500
Goodwill, Ending Balance	1,382	1,708	$ 4,166
Goodwill, Impairment Loss	0	2,458
Increase (Decrease) in Intangible Assets, Current	(1,100)
Amortization of Intangible Assets		400
Resource Plus, Inc [Member]
Goodwill, Ending Balance				$ 2,000
Goodwill, Impairment Loss		2,000
Mexico Business Member]
Goodwill, Ending Balance					$ 500
Goodwill, Impairment Loss		500
Resource Plus, Inc [Member]
Business Acquisition, Percentage of Voting Interests Acquired				51.00%
Mexico Business Member]
Business Acquisition, Percentage of Voting Interests Acquired					51.00%
Capitalized Software Costs [Member]
Capitalized Computer Software, Gross	1,000	1,500
Capitalized Computer Software, Amortization	1,100	$ 1,200
Customer Contracts And Lists [Member]
Amortization of Intangible Assets	$ 400
Customer Contracts And Lists [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Customer Contracts And Lists [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	25 years