Note 11 - Commitments and Contingencies (Details Textual) - USD ($)		3 Months Ended
		Mar. 31, 2020		Mar. 31, 2019	Dec. 31, 2019
Estimated Litigation Liability	[1]	$ 6,500,000			$ 10,900,000
Insurance Settlements Receivable	[2]	6,500,000			10,900,000
Proceeds from Insurance Settlement, Operating Activities		4,200,000
Increase (Decrease) in Litigation Reserve		(200,000)
Operating Lease, Right-of-Use Asset		1,695,000			1,988,000
Operating Lease, Liability, Total		1,893,000	[3]		2,243,000
Short-term Lease, Cost		100,000		$ 300,000
Sublease Income		$ 59,000		$ 49,000
Operating Lease, Weighted Average Remaining Lease Term (Year)		1 year 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent		3.70%
Office Space for Office Space in Northern California [Member]
Lessee, Operating Lease, Liability, to be Paid, Total		$ 900,000
Surety Bond [Member]
Loss Contingency, Range of Possible Loss, Portion Not Accrued		46,300,000			47,600,000
Loss Contingency, Estimated Remaining Costs of Work to be Completed		24,700,000			29,100,000
Corporate Joint Venture [Member] | Loans Payable [Member]
Related Party Transaction, Guarantor Obligations Underlying Asset Class, Guaranteed		4,400,000			5,800,000
Corporate Joint Venture [Member] | Financial Guarantee [Member]
Long-term Debt, Gross		$ 21,900,000			28,600,000
Ordinary Course Litigation [Member]
Estimated Litigation Liability					5,900,000
IBNR Construction Defect Claims [Member]
Estimated Litigation Liability					$ 5,000,000.0

[1] During 2019, we recorded litigation reserves totaling $5.9 million related to ordinary course litigation which developed and became probable and estimable within the 2019 fourth quarter. Further, as a result of the development of the construction defect related claims within the litigation reserve and their impact to the Company's litigation reserve estimates for IBNR future construction defect claims, we recorded an additional $5.0 million of IBNR construction defect claim reserves resulting in aggregate litigation reserves totaling $10.9 million as of December 31, 2019. Because the self-insured retention deductibles had been met for each claim covered by the $5.9 million reserve, and the self-insured retention deductibles are expected to be met for the $5.0 million IBNR construction defect claim reserves, the Company recorded estimated insurance receivables of $10.9 million offsetting the litigation reserves as of December 31, 2019. During the three months ended March 31, 2020, $4.2 million was paid by insurance related to one claim and the Company also reduced its litigation reserve estimate by $0.2 million for a separate claim, resulting in a litigation reserve balance of $6.5 million at March 31, 2020, with a corresponding decrease recorded within insurance receivables. Please refer to Note 7.

[2] At December 31, 2019, the Company recorded insurance receivables of $10.9 million in connection with $10.9 million of litigation reserves recorded. During the three months ended March 31, 2020, $4.2 million was paid by insurance related to one claim and the Company also reduced its insurance receivable estimate by $0.2 million for a separate claim, resulting in an insurance receivable balance of $6.5 million at March 31, 2020, with a corresponding decrease recorded within litigation reserves. For more information, please refer to Note 8.

[3] The weighted average remaining lease term and weighted average incremental borrowing rate used in calculating our lease liabilities were 1.8 years and 3.7%, respectively at March 31, 2020.