Note 6 - Inventories (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Note 6 - Inventories (Details) [Line Items]
Number of Active and Future Projects Owned		903	368	343
Impairment of Real Estate		$ 0	$ 0	$ 0
Number Of Current Future Communities Acquired During Period	10
Inventory Real Estate Not Owned		83,246,000	85,153,000
Other Lot Option Contracts Net Of Deposits		553,000	37,681,000
Acquisition Of Current and Future Communities [Member]
Note 6 - Inventories (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	$ 1,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	4,200,000
Business Acquisition, Transaction Costs	300,000
Other Lot Option Contracts [Member]
Note 6 - Inventories (Details) [Line Items]
Inventory Real Estate Not Owned		600,000	3,100,000
Inventory Owned [Member] | Acquisition Of Current and Future Communities [Member]
Note 6 - Inventories (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	31,500,000
Inventory Not Owned [Member] | Acquisition Of Current and Future Communities [Member]
Note 6 - Inventories (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	$ 4,900,000
Significant Deposits Paid Under Contract [Member]
Note 6 - Inventories (Details) [Line Items]
Other Lot Option Contracts Net Of Deposits			27,000,000
Land Option and Purchase Contracts [Member]
Note 6 - Inventories (Details) [Line Items]
Other Lot Option Contracts Net Of Deposits		$ 0	$ 7,600,000