Note 6 - Goodwill and Other Acquired Intangible Assets, Net Schedule of Goodwill (Details) - Mortgage and Real Estate Services Segment - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Gross, Beginning of Period	$ 200,561	$ 197,391
Goodwill, Acquired During Period	538	3,170
Goodwill, Gross, End of Period	201,099	200,561
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	(186,469)	(186,469)
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	(186,469)	(186,469)
Goodwill, Net	$ 14,630	$ 14,092	$ 10,922