Note 8 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Lease, Cost [Table Text Block]

	Year Ended December 31,
	2021		2020
Lease cost:
Operating lease cost	$	116	$	116
Short-term lease cost		-		17
Variable lease cost		29		29
Total	$	145	$	162

	Year Ended December 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	138	$	134

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

Maturity of lease liabilities	As of December 31, 2021
2022	$	105
2023		56
2024		10
2025		—
2026		—
2027 and thereafter		—
Total lease payments		171
Less: imputed interest		(12	)
Present value of operating lease liabilities	$	159