Note 4 - Commitments and Contingencies (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2020

Dec. 31, 2019

Notes Tables

Lease, Cost [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30, 20 20		June 30, 201 9		June 30, 20 20		June 30, 201 9
Operating expense:
Amortization expense – Finance ROU	$	11	$	16	$	21	$	32
Lease expense – Operating ROU		82		83		165		162
Other expense:
Interest expense – Finance ROU	$	—	$	1	$	1	$	2

	Year Ended
	December 30, 2019		December 31, 2018
Operating expense:
Amortization expense – Finance ROU		59		65
Lease expense – Operating ROU		433		316
Other expense:
Interest expense – Finance ROU		4		5

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

	Operating			Finance
Period ending June 30,	ROU Leases			ROU Leases			Total
2021	$	363		$	39		$	402
2022		363			5			368
2023		375			—			375
2024		384			—			384
2025		159			—			159
Thereafter		—			—			—
	$	1,644		$	44		$	1,688
Less Interest*		(183	)		(1	)
	$	1,461		$	43

	Operating			Finance
Period ending December 31,	ROU Leases			ROU Leases			Total
2020	$	362		$	45		$	407
2021		361			21			382
2022		369			—			369
2023		380			—			380
2024		352			—			352
	$	1,824		$	66		$	1,890
Less Interest*		(225	)		(2	)
	$	1,599		$	64