Note 11 - Stock Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Weighted-average
Expected volatility	91.36	%
Expected dividend yields	0.0	%
Expected terms (in years)	6.0
Risk-free interest rate	1.62	%
Expected forfeiture rate	5.0	%

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, 2013		3,061,393		$	0.71		6.50	$	3,169
Granted in 2013 (1)		793,000			2.02		–		36
Exercised/cancelled		(202,233	)		0.61		–		286
Forfeited or expired		(101,561	)		1.19		–		–
Outstanding at December 31, 2013		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
Exercisable at December 31, 2014		2,448,788		$	0.84		5.62	$	1,259
Vested and expected to vest at December 31, 2014		3,037,422		$	1.05		5.84	$	1,576

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			1,519,623		4.58		0.55		1,671,623	$	0.55
$	1.00-$2.00		1,121,204		6.74		1.40		639,774	$	1.32
$	2.01-$4.00		454,500		8.58		2.13		137,391	$	2.12
Outstanding at December 31, 2014			3,095,327				1.07		2,448,788	$	0.84

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, 2013		105,000		$	2.04
Granted		–			–
Vested		(25,000	)		2.09
Forfeited		–			–
Unvested at December 31, 2013		80,000			2.03
Granted		107,400			1.51
Vested		(80,000	)		2.03
Forfeited		–			–
Unvested at December 31, 2014		107,400		$	1.51