Note 5 - Leases (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Lessee, Operating Lease Right-of-use Assets and Liabilities [Table Text Block]

	March 31,		December 31,
	2021		2020
Office leases	$	290	$	429
Total operating lease right-of-use assets, net	$	290	$	429

	March 31,		December 31,
	2021		2020
Office leases	$	274	$	432
Total current lease liabilities	$	274	$	432

Lease, Cost [Table Text Block]

	Three Months Ended March 31,
	2021		2020
Office leases	$	150	$	205
Land leases		—		107
Total operating lease expense		150		312
Short-term lease expense		54		91
Land option expense		—		8
Total land option and lease expense	$	204	$	411

	Three Months Ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of operating lease liabilities:
Cash flows from operating activities	$	170	$	259

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

2021 (remaining)	$	282
2022		—
2023		—
2024		—
2025		—
Thereafter		—
Total undiscounted lease payments		282
Discount to present value		(8	)
Present value of lease liabilities	$	274
Weighted average remaining lease term - years		0.4
Weighted average discount rate - percent		12.0