Note 20 - Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Quarterly Financial Information [Table Text Block]

	Quarter Ended
	March 31, 2019			June 30, 2019			September 30, 2019			December 31, 2019			Total
Revenue	$	223		$	132		$	421		$	597		$	1,373
Gross profit		44			29			137			331		$	541
Operating loss		(1,878	)		(3,333	)		(1,520	)		(1,159	)	$	(7,890	)
Net loss		(1,768	)		(3,224	)		(1,395	)		(1,044	)	$	(7,431	)
Basic and diluted net loss per common share	$	(0.00	)	$	(0.00	)	$	(0.00	)	$	(0.00	)	$	(0.01	)

	Quarter Ended
	March 31, 2018			June 30, 2018			September 30, 2018			December 31, 2018			Total
Revenue	$	80		$	55		$	253		$	144		$	532
Gross profit (loss)		(1	)		(6	)		(631	)		6		$	(632	)
Operating loss		(2,196	)		(2,177	)		(2,613	)		(1,974	)	$	(8,960	)
Net loss and comprehensive loss		(2,163	)		(2,142	)		(2,524	)		(1,872	)	$	(8,701	)
Basic and diluted net loss per common share	$	(0.00	)	$	(0.00	)	$	(0.00	)	$	(0.00	)	$	(0.01	)