Note 6 - Goodwill and Other Acquired Intangible Assets, Net Schedule of Goodwill (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill, Dispositions	[1]	$ (191,297)
Accumulated Amortization, Goodwill, Dispositions	[1]	191,297
Goodwill, Dispositions, Net	[1]	0
Real Estate segment
Goodwill [Roll Forward]
Goodwill, Gross, Beginning of Period		201,099	$ 200,561
Goodwill, Acquired During Period			538
Goodwill, Gross, End of Period		9,802	201,099
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period		(191,297)	(186,469)
Goodwill, Impairment Loss			(4,828)
Goodwill, Impaired, Accumulated Impairment Loss, End of Period		0	(191,297)
Goodwill, Net		$ 9,802	$ 9,802	$ 14,092

[1] Related to the sale of Clayton in January 2020. See Note 7 of Notes to Consolidated Financial Statements in our 2019 Form 10-K for additional information on the sale of Clayton.