Note 8 - Common Stock (Tables)

12 Months Ended

Dec. 31, 2013

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, 2010		1,470		$	5.00	$	-
Granted		370			2.98
Exercised		(107	)		4.92
Canceled		(401	)		5.77
Balance, December 31, 2011		1,332			4.21		1,724
Granted		1,095			3.94
Exercised		(176	)		4.71
Canceled		(198	)		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
Exercisable at December 31, 2013		601		$	4.76	$	649

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 12/31/13		Weighted- Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number Exercisable at 12/31/13		Weighted  Average Exercise Price
$	1.36	-	4.18		1,015		7.96	$	2.45		319	$	1.84
$	4.19	-	8.35		1,027		9.01		4.79		137		5.10
$	8.36	-	11.45		145		0.23		10.89		145		10.89
Total					2,187		7.94	$	4.11		601	$	4.76

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

	2013					2012					2011
Risk free interest rate range		1.86	-	2.88	%		1.53	-	2.26	%		1.81	-	3.75	%
Weighted average life (in years)			10					10					10
Weighted average volatility			66.81		%			66.10		%			64.81		%
Volatility range		66.10	-	66.93	%		65.81	-	66.34	%		60.27	-	66.44	%
Expected dividend yield			-					-					-
Weighted average grant-date fair value per share of options granted	$		3.48			$		2.87			$		2.20

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Restricted Stock Shares			Weighted Average Grant Date Value
Nonvested restricted stock at December 31, 2011		226		$	2.67
Granted		9			5.72
Vested		(49	)		3.35
Cancelled/Forfeited		(74	)		1.82
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