Note 8 - Stock Options (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

(In thousands)	Common Shares Reserved for Future Issuance
Preferred Stock		1,067
2015 Plan		600
2005 Plan		1,118
Total		2,785

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

	201 8					201 7
	Number of Options (in thousands)			Weighted Average Exercise Price		Number of Options (in thousands)			Weighted Average Exercise Price
Outstanding at beginning of year		1,746		$	0.68		2,254		$	0.64
Granted at price = market value		24			1.15		24			0.42
Granted at price > market value		—			—		—			—
Exercised		(451	)		0.37		(50	)		0.22
Forfeited		—			—		—			—
Expired		(84	)		0.22		(482	)		0.55
Outstanding at end of year		1,235		$	0.83		1,746		$	0.68
Options exercisable at end of year		1,172		$	0.84		1,662		$	0.68

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 12/31/1 8 (in thousands)		Weighted Average Remaining Contractual Life (years)	Weighted Average Exercise Price		Exercisable at 12/31/1 8 (in thousands)		Weighted Average Exercise Price
$ 0.28	-	$0.50		572	2.79	$	0.39		533	$	0.39
$ 0.51	-	$1.00		361	2.52	$	0.68		361	$	0.68
$ 1.01	-	$2.73		302	4.36	$	1.86		278	$	1.92
				1,235	3.09	$	0.83		1,172	$	0.84

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, 201 8
Number of outstanding options (in thousands)		1,229		1,172
Weighted average remaining contractual life		3.07		2.80
Weighted average exercise price per share	$	0.83	$	0.84
Intrinsic value (in thousands)	$	3,092	$	2,940