Note 9 - Homebuilding Prepaid and Other Assets - Summary of Homebuilding Prepaid and Other Assets (Details) - Homebuilding Segment [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Deferred marketing costs (Note 2)			$ 34,227
Land option deposits	32,764		22,203
Goodwill	6,008		6,008
Prepaid expenses	8,029		6,128
Deferred debt issuance costs on revolving credit facility, net	5,030		5,880
Other	1,157		1,220
Total	$ 52,988	$ 41,439	$ 75,666