Note 11 - Stock-based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

						Weighted-
				Weighted-		Average		Aggregate
				Average		Remaining		Intrinsic
	Covered			Exercise		Contractual		Value
Option Awards	Shares			Price		Term (Years)		(thousands)
Outstanding at January 1, 2014		3,550,599		$	0.99		6.64	$	3,577
Exercised/cancelled		(453,522	)		0.53		–		445
Forfeited or expired		(1,750	)		1.01		–		–
Outstanding at December 31, 2014		3,095,327		$	1.07		6.39	$	1,322
Exercised/cancelled		61,124			0.69		–		46
Forfeited or expired		67,709			1.62		–		–
Outstanding at December 31, 2015		2,966,494		$	1.05		5.17	$	753
Exercisable at December 31, 2015		2,543,941		$	0.91		4.76	$	753

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

			Option Awards Outstanding						Option Awards Exercisable
					Weighted
					Average		Weighted				Weighted
			Covered		Remaining		Average		Covered		Average
Range of			Shares		Contractual		Exercise		Shares		Exercise
Exercise Prices			Outstanding		Life		Price		Exercisable		Price
Less than $1.00				1,596,186		3.64	$	0.55		1,596,186	$	0.55
$1.00	-	$2.00		942,808		6.68		1.42		717,755		1.35
$2.01	-	$4.00		427,500		7.58		2.13		230,000		2.13
Outstanding at December 31, 2015				2,966,494			$	1.05		2,543,941	$	0.91

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

				Weighted-
				Average
				Grant Date
				Fair Value
	Shares			per Share
Unvested at January 1, 2014		80,000		$	2.03
Granted		107,400			1.51
Vested		(80,000	)		2.03
Forfeited		–			–
Unvested at December 31, 2014		107,400			1.51
Granted		118,100			1.31
Vested		(25,625	)		1.51
Forfeited		(4,900	)		–
Unvested at December 31, 2015		194,975		$	1.39