Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

v3.7.0.1
Note 2 - Summary of Significant Accounting Policies (Details Textual)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Warranty Period 1 year  
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]    
Concentration Risk, Number of Customers 2 3
Concentration Risk, Percentage 33.00% 86.00%