Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Related Party Transactions (Details Textual)

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Note 10 - Related Party Transactions (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 04, 2007
shares
Sep. 23, 2014
shares
Sep. 30, 2015
USD ($)
shares
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
shares
Sep. 30, 2014
USD ($)
Dec. 31, 2014
shares
Stellartech Research Corporation [Member] | Based On Postmerger Exchange Ratio [Member]              
Stock Issued During Period, Shares, New Issues 2,415            
Stellartech Research Corporation [Member]              
Shares of Common Stock Subject to Repurchase     0   0   0
Stock Issued During Period, Shares, New Issues 300,000            
Conversion of Stock Exchange Ratio 0.0080497            
Right to Repurchase Stock Term         4 years    
Related Party Transaction, Amounts of Transaction | $     $ 1,871,000 $ 182,000 $ 3,082,000 $ 345,000  
Stock Issued During Period, Shares, New Issues   11,305,567