Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)			12 Months Ended
		Jan. 01, 2018 USD ($)	Dec. 31, 2019 USD ($) shares		Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($)	Jun. 28, 2019 USD ($)	Jan. 01, 2019 USD ($)
Entity Public Float							$ 58,925,798
Restricted Cash, Total			$ 117,000		$ 269,000	$ 424,000
Impairment of Real Estate			10,200,000		10,000,000.0	2,200,000
Deferred Costs, Total	[1]		7,148,000		11,282,000
Nonrefundable Cash Deposits			15,800,000
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance			112,000		76,000
Equity Method Investment, Impairment of Joint Ventures			70,000,000.0		28,776,000	0
Equity Method Investment, Impairment of Unconsolidated Entity Investments			$ 3,500,000		18,900,000	0
Capitalized Contract Cost, Amortization Period			30 months
Period of General Warranty			1 year
Accounts Receivable, Allowance for Credit Loss, Ending Balance			$ 0		0
Capitalized Selling and Marketing Cost, Amortization Period			30 months
Depreciation, Total			$ 8,957,000		$ 6,631,000	449,000
Deferred Tax Assets, Valuation Allowance, Total			0
Unrecognized Tax Benefits, Ending Balance			0
Income Tax Examination, Penalties and Interest Accrued, Total			$ 0
Cumulative Effect of New Accounting Principle in Period of Adoption						(3,365,000)
Stock Repurchased and Retired During Period, Shares | shares			153,916		1,003,116
Stock Repurchased and Retired During Period, Value			$ 1,042,000		$ 8,563,000
Stock Repurchased and Retired During Period, Less Commissions, Value					8,500,000
Dividends, Common Stock, Total			$ 0		0	0
Defined Contribution Plan, Employer Matching Contribution, Percent of Match			50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay			8.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount			$ 11,200
Defined Contribution Plan, Employer Discretionary Contribution Amount			1,000,000.0		1,000,000.0	800,000
Operating Lease, Right-of-Use Asset	[2]		1,988,000		0
Operating Lease, Liability, Total	[3]		2,243,000	[4]	0
Unconsolidated Joint Ventures [Member]
Equity Method Investment, Other than Temporary Impairment			$ 0		$ 1,100,000	0
Maximum [Member]
Property, Plant and Equipment, Useful Life			5 years
Maximum [Member] | Unconsolidated Joint Ventures [Member]
Equity Method Investment, Ownership Percentage			35.00%		35.00%
Minimum [Member]
Limited Warranty Period			2 years
Property, Plant and Equipment, Useful Life			3 years
Minimum [Member] | Unconsolidated Joint Ventures [Member]
Equity Method Investment, Ownership Percentage			5.00%		5.00%
Noncontrolling Interest [Member]
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance			$ 100,000		$ 100,000
Cumulative Effect of New Accounting Principle in Period of Adoption						0
Stock Repurchased and Retired During Period, Value			(0)		(0)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption						(3,347,000)
Stock Repurchased and Retired During Period, Value			(0)		123,000
Additional Paid-in Capital [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption						$ (18,000)
Stock Repurchased and Retired During Period, Value			$ 1,040,000		$ 8,430,000
Customer Concentration Risk [Member] | Fee Building Revenue [Member]
Number of Major Customers			1		1	1
Customer Concentration Risk [Member] | Fee Building Revenue [Member] | One Customer [Member]
Concentration Risk, Percentage			95.00%		95.00%	97.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Major Customers			1		1
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]
Concentration Risk, Percentage			65.00%		48.00%
Accounting Standards Update 2014-09 [Member]
Cumulative Effect on Retained Earnings, Net of Tax, Total		$ (3,400,000)
Deferred Costs, Total		(4,700,000)
Deferred Tax Assets, Gross, Total		1,300,000
Accounting Standards Update 2018-07 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		18,000
Accounting Standards Update 2018-07 [Member] | Additional Paid-in Capital [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ (18,000)
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset								$ 3,100,000
Operating Lease, Liability, Total								$ 3,500,000

[1] Capitalized selling and marketing costs includes costs incurred for tangible assets directly used in the sales process such as our sales offices, design studios and model furnishings, and also includes model landscaping costs, which were $2.8 million and $5.6 million as of December 31, 2019 and 2018, respectively. The Company depreciated $8.7 million and $6.2 million, of capitalized selling and marketing costs to selling and marketing expenses during the years ended December 31, 2019 and 2018, respectively.

[2] In conjunction with the adoption of ASC 842, the Company established a right-of-use asset of $3.1 million on January 1, 2019. For more information, please refer to Note 1 and Note 11.

[3] In conjunction with the adoption of ASC 842, the Company established a $3.5 million lease liability on January 1, 2019. For more information, please refer to Note 1 and Note 11.

[4] The weighted average remaining lease term and weighted average incremental borrowing rate used in calculating our lease liabilities were 1.9 years and 4.4%, respectively, at December 31, 2019.