Note 8 - Stock Options (Tables)

12 Months Ended

Dec. 31, 2019

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		824
Total		2,491

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	201 9					201 8
	Number of Options (in thousands)			Weighted Average Exercise Price		Number of Options (in thousands)			Weighted Average Exercise Price
Outstanding at beginning of year		1,235		$	0.83		1,746		$	0.68
Granted at price = market value		34			4.40		24			1.15
Granted at price > market value		—			—		—			—
Exercised		(294	)		0.81		(451	)		0.37
Forfeited		—			—		—			—
Expired		—			—		(84	)		0.22
Outstanding at end of year		975		$	0.96		1,235		$	0.83
Options exercisable at end of year		917		$	0.84		1,172		$	0.84

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

			Options Outstanding						Options Exercisable
Range of Exercise Prices			Outstanding at 12/31/1 9 (in thousands)		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Exercisable at 12/31/1 9 (in thousands)		Weighted Average Exercise Price
$ 0.34	-	$0.50		391		2.86	$	0.42		383	$	0.42
$ 0.51	-	$1.00		330		1.53		0.68		330		0.68
$ 1.01	-	$2.00		173		4.69		1.71		157		1.77
$ 2.01	-	$4.75		81		6.95		3.12		47		2.20
				975		3.08	$	0.96		917	$	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 9
Number of outstanding options (in thousands)		970		917
Weighted average remaining contractual life		3.04		2.71
Weighted average exercise price per share	$	0.95	$	0.84
Intrinsic value (in thousands)	$	4,411	$	4,278