Note 9 - Stock Options (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Common Shares Reserved for Future Issuance [Table text Block]

(In  thousands)	Common  Shares Reserved for Future Issuance
Pr eferred Stock		1,067
2015 Plan		600
2005 Plan		1,653
Total		3,320

Share-based Compensation, Stock Options, Activity [Table Text Block]

	2017					2016
	Number  of Options (in thousands)			Weighted Average Exercise Price		Number  of Options (in thousands)			Weighted Average Exercise Price
Outstanding at beginning of year		2,254		$	0.64		2,598		$	0.63
Granted at price = market value		24			0.42		69			0.36
Granted at price > market value		—			—		—			—
Exercised		(50	)		0.22		(136	)		0.73
Forfeited		—			—		(18	)		1.80
Expired		(482	)		0.55		(259	)		0.35
Outstanding at end of year		1,746		$	0.68		2,254		$	0.64
Options exercisable at end of year		1,662		$	0.68		2,079		$	0.59

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Options  Outstanding						Options  Exercisable
Range  of Exercise Prices			Outstanding  at 12/31/17 (in thousands)		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Exercisable  at 12/31/17 (in thousands)		Weighted Average Exercise Price
$  0.20	-	$0.50		985		2.52	$	0.34		914	$	0.34
$  0.51	-	$1.00		481		2.98	$	0.65		481	$	0.65
$  1.01	-	$2.73		280		4.94	$	1.92		267	$	1.90
				1,746		3.03	$	0.68		1,662	$	0.68

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

	Outstanding  Stock Options (Fully Vested and Expected to Vest)*		Options  that are Exercisable
As  of December 31, 2017
Number of outs tanding options (in thousands)		1,738		1,662
Weighted average remaining contractual life		3.01		2.75
Weighted average exercise price per share	$	0.68	$	0.68
Intrinsic value (in thousands)	$	1,178	$	1,123