Note 6 - Leases - Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease expense	$ 1,175
Short-term lease expense	321
Land option expense	543
Total land option and lease expense	2,039
Cash flows from operating activities	1,844
Adoption of Topic 842	1,562
In exchange for new operating lease liabilities during the period	443
Office Leases [Member]
Operating lease expense	719
Land Leases [Member]
Operating lease expense	$ 456