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Note 9 - Common Stock (Details) (USD $)
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 2 Months Ended
May 31, 2013
Jan. 17, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Dec. 31, 2007
Dec. 31, 2004
Dec. 31, 2003
Dec. 31, 2002
Jul. 31, 2013
Jun. 09, 2013
May 14, 2013
Apr. 30, 2013
May 31, 2013
Common Stock Warrants [Member]
Common Stock [Member]
Jan. 31, 2013
Common Stock Warrants [Member]
Common Stock [Member]
Dec. 31, 2013
Warrant Exercise Price Adjustment [Member]
Series A Convertible Preferred Stock [Member]
May 14, 2013
Warrant Exercise Price Adjustment [Member]
Jan. 17, 2013
Warrant Exercise Price Adjustment [Member]
Dec. 31, 2011
Common Stock [Member]
General and Administrative Expense [Member]
Dec. 31, 2013
Common Stock [Member]
Series A Convertible Preferred Stock [Member]
Sep. 30, 2012
Common Stock [Member]
Series A Convertible Preferred Stock [Member]
Dec. 31, 2012
Common Stock [Member]
Members of Board of Directors and Management [Member]
Dec. 31, 2011
Common Stock [Member]
Members of Board of Directors and Management [Member]
Oct. 30, 2013
Common Stock [Member]
Dec. 31, 2013
Common Stock [Member]
Dec. 31, 2012
Common Stock [Member]
Dec. 31, 2011
Common Stock [Member]
Dec. 31, 2010
Common Stock [Member]
Dec. 31, 2009
Common Stock [Member]
Dec. 31, 2008
Common Stock [Member]
Dec. 31, 2007
Common Stock [Member]
Dec. 31, 2004
Common Stock [Member]
Dec. 31, 2003
Common Stock [Member]
Dec. 31, 2002
Common Stock [Member]
Dec. 31, 2011
Warrant [Member]
General and Administrative Expense [Member]
May 31, 2013
Warrant [Member]
Jan. 17, 2013
Warrant [Member]
Oct. 30, 2013
General and Administrative Expense [Member]
Dec. 31, 2013
General and Administrative Expense [Member]
Dec. 31, 2012
General and Administrative Expense [Member]
Dec. 31, 2011
General and Administrative Expense [Member]
Mar. 16, 2012
Series A Convertible Preferred Stock [Member]
Dec. 31, 2013
Series A Convertible Preferred Stock [Member]
Nov. 30, 2013
Series A Convertible Preferred Stock [Member]
Jan. 31, 2012
Members of Board of Directors and Management [Member]
Note 9 - Common Stock (Details) [Line Items]                                                                                                
Common Stock, Shares Authorized     75,000,000 75,000,000                 75,000,000 40,000,000                                                                    
Stock Issued During Period, Shares, New Issues                                 1,166,666 1,766,667       818,376 2,048,570 1,882,667 407,999 658,520     407,999 658,520 12,000 216,261 306,419 406,729 1,482,605 1,229,278 2,789,954               2,200     380,954
Stock Issued During Period, Value, New Issues (in Dollars)       $ 273,360 $ 441,210 $ 90,000 $ 1,520,000 $ 1,771,091 $ 3,162,950 $ 239,919 $ 2,459,609 $ 470         $ 583,333 $ 1,060,000             $ 273,360 $ 441,210     $ 408 $ 659 $ 12 $ 216 $ 306 $ 407 $ 1,483 $ 1,229 $ 2,790                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                                     5,866,666                   612,001 987,783                             8,799,999     571,432
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Share)   0.60 2.07 0.75                     0.50 0.60                         1.00 1.00                               0.35 1.00 1.00
Stock Issued During Period, Shares, Issued for Services                                                     50,000 50,000   129,245 10,500 4,500 10,000                              
Allocated Share-based Compensation Expense (in Dollars)     143,435 310,076 463,752                                                                 152,126     20,500 101,896 231,936 284,352        
Class of Warrant or Right, Outstanding     8,292,226                                 1,166,666 2,933,333                                                      
Number of Warrants Issued During Period   1,766,667                                                                                            
Proceeds from Warrant Exercises (in Dollars) 583,333 1,060,000                                                                                            
Class of Warrant or Right, Unissued   1,166,666                                                                                            
Other General and Administrative Expense (in Dollars)                                                                             $ 19,617 $ 218,551                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)   0.60 2.07 0.75                     0.50 0.60                         1.00 1.00                               0.35 1.00 1.00