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Note 9 - Convertible Preferred Stock (Details) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 9 Months Ended
Sep. 23, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Dec. 30, 2013
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
December 2008 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
December 2008 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
April 2009 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
April 2009 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
November 2010 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
November 2010 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
April 2012 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series A Preferred Stock [Member]
April 2012 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
April 2012 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
April 2012 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
May 2011 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
May 2011 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
June 2011 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
June 2011 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
September 2011 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
September 2011 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
November 2011 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
November 2011 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
December 2011 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
December 2011 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
January 2012 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
January 2012 Warrants [Member]
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
February 2012 Warrants [Member]
Dec. 30, 2013
Other Nonoperating Income (Expense) [Member]
Series B Preferred Stock [Member]
February 2012 Warrants [Member]
Dec. 31, 2008
Series A Preferred Stock [Member]
December 2008 Warrants [Member]
Dec. 30, 2013
Series A Preferred Stock [Member]
December 2008 Warrants [Member]
Apr. 30, 2009
Series A Preferred Stock [Member]
April 2009 Warrants [Member]
Dec. 30, 2013
Series A Preferred Stock [Member]
April 2009 Warrants [Member]
Nov. 30, 2010
Series A Preferred Stock [Member]
November 2010 Warrants [Member]
Dec. 30, 2013
Series A Preferred Stock [Member]
November 2010 Warrants [Member]
Apr. 30, 2012
Series A Preferred Stock [Member]
April 2012 Warrants [Member]
Dec. 30, 2013
Series A Preferred Stock [Member]
April 2012 Warrants [Member]
Sep. 30, 2014
Series A Preferred Stock [Member]
Apr. 30, 2012
Series B Preferred Stock [Member]
April 2012 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
April 2012 Warrants [Member]
May 31, 2011
Series B Preferred Stock [Member]
May 2011 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
May 2011 Warrants [Member]
Jun. 30, 2011
Series B Preferred Stock [Member]
June 2011 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
June 2011 Warrants [Member]
Sep. 30, 2011
Series B Preferred Stock [Member]
September 2011 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
September 2011 Warrants [Member]
Nov. 30, 2011
Series B Preferred Stock [Member]
November 2011 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
November 2011 Warrants [Member]
Dec. 31, 2011
Series B Preferred Stock [Member]
December 2011 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
December 2011 Warrants [Member]
Jan. 31, 2012
Series B Preferred Stock [Member]
January 2012 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
January 2012 Warrants [Member]
Feb. 28, 2012
Series B Preferred Stock [Member]
February 2012 Warrants [Member]
Dec. 30, 2013
Series B Preferred Stock [Member]
February 2012 Warrants [Member]
Sep. 30, 2014
Series B Preferred Stock [Member]
Apr. 30, 2012
April 2012 Warrants [Member]
Note 9 - Convertible Preferred Stock (Details) [Line Items]                                                                                                                      
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in Dollars per share)                                                                                 $ 0.0488                                 $ 0.004  
Preferred Stock, Dividends Per Share, Declared (in Dollars per share)                                                                                 $ 0                                 $ 0  
Preferred Stock, Conversion Price (in Dollars per share)                                                                                 $ 0.05                                 $ 0.05  
Convertible Preferred Stock, Terms of Conversion, Minimum Aggregate Gross Proceeds Required for Automatic Conversion                                                                                 $ 30,000,000                                 $ 30,000,000  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) 940,189             16,680,324                                                 196,721 196,721 245,900 245,900 163,934 163,934 73,770 73,770   2,351,019 2,351,019 2,000,000 2,000,000 4,000,000 4,000,000 4,000,000 4,000,000 1,000,000 1,000,000 1,000,000 1,000,000 910,445 910,445 738,535 738,535   73,770
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 0.53           $ 0.06                                                   $ 0.61 $ 0.61 $ 0.61 $ 0.61 $ 0.61 $ 0.61 $ 0.61 $ 0.61   $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05 $ 0.05   $ 0.61
Warrant Term 5 years                                                               10 years   10 years   10 years   10 years     10 years   10 years   10 years   10 years   10 years   10 years   10 years   10 years      
Warrant Liabilities Noncurrent     580,187 602,188     623,672 [1] 623,672                                                 53,863 44,066 70,082 58,278 46,721 46,393 27,443 24,934   98,743 72,882 84,000 54,000 168,000 108,000 168,000 108,000 42,000 28,000 41,000 28,000 37,328 28,224 31,018 22,895    
Fair Value Assumptions, Expected Dividend Rate                                                                 0.00%   0.00%   0.00%   0.00%     0.00%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%   0.00%      
Fair Value Assumptions, Expected Volatility Rate                                                                 79.00%   79.00%   79.00%   92.00%     84.00%   84.00%   84.00%   84.00%   84.00%   84.00%   84.00%   84.00%      
Fair Value Assumptions, Risk Free Interest Rate                                                                 2.70%   2.80%   2.90%   1.98%     2.00%   3.20%   3.20%   2.00%   2.10%   1.80%   1.80%   1.98%      
Fair Value Assumptions, Expected Term                                                                 10 years   10 years   10 years   10 years     10 years   10 years   10 years   10 years   10 years   10 years   10 years   10 years      
Fair Value Adjustment of Warrants   $ 7,277 $ 22,001 $ 21,484 $ (50,762) $ (11,230)     $ 9,639 $ (2,361) $ 11,803 $ (984) $ 2,295 $ (1,311) $ 3,025 $ 885 $ 9,404 $ 2,351 $ 2,000 $ 2,000 $ 4,000 $ 4,000 $ 0 $ 4,000 $ 1,000 $ 1,000 $ 1,000 $ 0 $ 3,642 $ 910 $ 2,954 $ 740                                                      
[1] The balance sheet as of December 31, 2013 has been derived from the audited financial statements at that date.