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Note 9 - Stock-Based Compensation and Other Employee Benefit Plans (Details) - Stock Options Issued Under 2007 Equity Plan (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
$.58 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.30 - $0.48 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.30 - $0.48 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.30 - $0.48 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.40 - $1.89 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.40 - $1.89 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.40 - $1.89 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.28 - $0.99 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.28 - $0.99 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.28 - $0.99 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.31 - $0.70 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.31 - $0.70 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.31 - $0.70 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.22 - $0.50 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.22 - $0.50 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.22 - $0.50 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.34 - $0.51 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.34 - $0.51 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.34 - $0.51 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.28 - $0.40 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.28 - $0.40 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.28 - $0.40 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
$0.44 [Member]
2007 Equity Incentive Plan [Member]
Dec. 31, 2013
$0.44 [Member]
2007 Equity Incentive Plan [Member]
Minimum [Member]
Dec. 31, 2013
$0.44 [Member]
2007 Equity Incentive Plan [Member]
Maximum [Member]
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2010
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2010
Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]                                                                    
Options Outstanding (in Shares)       200,000 2,116,943     525,000     892,135     810,000     1,312,507     1,989,340     715,161     8,561,086                
Exercise Price       $ 0.58   $ 0.30 $ 0.48   $ 0.40 $ 1.89   $ 0.28 $ 0.99   $ 0.31 $ 0.70   $ 0.22 $ 0.50   $ 0.34 $ 0.51   $ 0.28 $ 0.40   $ 0.22 $ 1.89 $ 0.25 $ 0.25 $ 0.23 $ 1.89 $ 1.89 $ 1.89
Weighted Average Contractual Life       1 year 2 years     4 years     5 years     6 years     7 years     8 years     9 years     6 years                
Weighted Average Exercise Price $ 0.44 $ 0.44 $ 0.42 $ 0.58   $ 0.30 $ 0.48   $ 0.40 $ 1.89   $ 0.28 $ 0.99   $ 0.31 $ 0.70   $ 0.22 $ 0.50   $ 0.34 $ 0.51   $ 0.28 $ 0.40 $ 0.44                
Exercisable Options Outstanding (in Shares)       200,000 2,116,943     525,000     892,135     810,000     1,312,507     1,989,340     665,161     8,511,086                
Exercisable Options Weighted Average Exercise Price       $ 0.58   $ 0.30 $ 0.48   $ 0.40 $ 1.89   $ 0.28 $ 0.99   $ 0.31 $ 0.70   $ 0.22 $ 0.50   $ 0.34 $ 0.51   $ 0.28 $ 0.40 $ 0.44