Note 8 - Common Stock (Tables)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity Note [Abstract]

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

	Number of Options			Weighted Average Option Price		Aggregate Intrinsic Value
Balance, December 31, 2011		1,332			4.21	$	1,724
Granted		1,095			3.94
Exercised		(177	)		4.71
Canceled		(197	)		3.79
Balance, December 31, 2012		2,053			4.06		448
Granted		592			4.64
Exercised		(15	)		1.71
Canceled		(443	)		4.69
Balance, December 31, 2013		2,187			4.11		1,455
Granted		144			5.41
Exercised		(18	)		1.51
Canceled		(530	)		5.62
Balance, December 31, 2014		1,783			3.79		200
Exercisable at December 31, 2014		617		$	2.88	$	179

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			Number Outstanding at 12/31/14		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number Exercisable at 12/31/14		Weighted Average Exercise Price
$1.36	-	$4.18		800		6.93	$	2.43		431	$	1.97
$4.19	-	$6.61		983		8.29		4.89		186		4.99
	Total			1,783		7.68	$	3.79		617	$	2.88

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

	2014			2013			2012
Risk free interest rate range	2.63	-	2.70%	1.86	-	2.88%	1.53	-	2.26%
Weighted average life (in years)		10			10			10
Weighted average volatility		65.47%			66.81%			66.10%
Volatility range	65.30	-	66.18%	66.10	-	66.93%	65.81	-	66.34%
Expected dividend yield		-			-			-
Weighted average grant-date fair value per share of options granted		$4.06			$3.48			$2.87

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

	Restricted Stock Shares			Weighted Average Grant Date Value
Nonvested restricted stock at December 31, 2012		112		$	3.17
Granted		-			-
Vested		(40	)		3.08
Cancelled/Forfeited		(10	)		3.35
Nonvested restricted stock at December 31, 2013		62			3.21
Granted		-			-
Vested		(31	)		3.21
Cancelled/Forfeited		(2	)		1.82
Nonvested restricted stock at December 31, 2014		29		$	3.29