Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Note Payable (Details Textual)

v3.7.0.1
Note 5 - Note Payable (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
May 22, 2017
Jun. 20, 2016
May 31, 2017
Jun. 30, 2017
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       642,622
June 2016 Issuance Related to 2016 Loan Agreement [Member]        
Warrant Term   10 years    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   100,402   100,402
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 4.98   $ 4.98
May 2017 Issuance Related to 2017 Loan Agreement [Member]        
Number of Warrants Issued During Period 2      
Warrant Term 10 years   10 years  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 222,049   222,049 222,049
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 9.50   $ 9.50 $ 9.50
The 2016 Loan Agreement [Member] | Western Alliance Bank [Member]        
Debt Instrument, Face Amount   $ 10,000,000    
Debt Instrument, Fee, Percentage   4.00%    
The 2016 Loan Agreement [Member] | Western Alliance Bank [Member] | First Tranche [Member]        
Proceeds from Issuance of Long-term Debt   $ 7,500,000    
The 2016 Loan Agreement [Member] | Western Alliance Bank [Member] | Second Tranche [Member]        
Proceeds from Issuance of Long-term Debt   $ 2,500,000    
The 2017 Loan Agreement [Member] | CRG LP [Member]        
Debt Agreement, Covenant, Additional Funding $ 10,000,000      
Debt Agreement, Maximum Borrowing Capacity 30,000,000      
Debt Instrument, Covenant, Additional Funding, Minimum Net Revenue 16,000,000      
Debt Instrument, Covenant, Additional Funding, Minimum Average Market Capitalization $ 60,000,000      
Debt Instrument, Term 6 years      
Debt instrument, Interest Only Payment, Period 4 years      
Debt Instrument, Interest Rate, Stated Percentage 12.50%      
Debt Instrument, Interest Rate, Stated Percentage Deferred During Interest-only Period 4.00%      
Paid-in-Kind Interest       $ 80,000
Debt Instrument, Prepayment Fee, Percentage 5.00%      
Debt Instrument, Prepayment Fee, Period of Term 5 years      
Debt Instrument, Covenant, Cash and Cash Equivalents $ 2,000,000      
Debt Instrument, Face Amount $ 20,000,000