Note 6 - Operating Lease Right-of-use Asset, Net (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Lease, Cost [Table Text Block]

	December 31,
	2020			2019
Straight-line rent expense recognized for operating lease	$	601		$	601
Variable rent expense recognized for operating lease		395			264
Total rent expense	$	996		$	865
Weighted average remaining lease term (in years)		1.0			2.0
Weighted average discount rate		12.05	%		12.05	%

Schedule of Operating Leases Cash Flow Information [Table Text Block]

	December 31,
	2020		2019
Cash paid for amounts included in the measurement of lease liabilities	$	630	$	612
Cash lease expense (imputed interest expense component of net income)	$	103	$	161

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

For the years ending December 31,
2021	$	649
2022		—
2023		—
Thereafter		—
Total undiscounted lease payments		649
Less imputed interest		35
Total operating lease liabilities	$	614