XML 63 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 6 - Segment and Geographic Information - Customers with Accounts Receivable Greater than 10% (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Distributor A [Member]    
Concentration risk 17.00% 19.00%
Distributor B [Member]    
Concentration risk 16.00% [1]
Distributor C [Member]    
Concentration risk 12.00% 17.00%
[1] Represents less than 10%.