Annual report pursuant to Section 13 and 15(d)

Note 1 - The Company and Basis of Presentation (Details Textual)

v3.6.0.2
Note 1 - The Company and Basis of Presentation (Details Textual) - USD ($)
12 Months Ended
Jun. 17, 2016
Nov. 24, 2015
May 14, 2015
Dec. 31, 2016
Dec. 31, 2015
May 29, 2016
Dec. 31, 2014
Proceeds from Issuance of Common Stock       $ 13,886,000 $ 16,433,000    
Common Stock, Par or Stated Value Per Share           $ 0.0001  
Proceeds from Issuance Of Private Placement Gross   $ 6,000,000 $ 12,000,000        
Proceeds from Issuance of Private Placement Net   $ 5,393,000 $ 11,040,000        
Cash and Cash Equivalents, at Carrying Value       8,086,000 7,360,000   $ 895,000
Working Capital       6,791,000      
Retained Earnings (Accumulated Deficit)       $ (68,622,000) $ (48,511,000)    
June 2016 Offering [Member]              
Stock Issued During Period, Shares, New Issues 3,105,000            
Share Price $ 5            
Proceeds from Issuance of Common Stock $ 15,525,000            
Proceeds From Issuance of Common Stock, Net $ 13,886,000            
Private Placement [Member]              
Stock Issued During Period, Shares, New Issues   1,071,679 4,054,062        
Share Price   $ 5.60 $ 2.96