Annual report pursuant to Section 13 and 15(d)

Note 2 - Summary of Significant Accounting Policies - Revenue From Unaffiliated Customers by Geographic Area (Details)

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Note 2 - Summary of Significant Accounting Policies - Revenue From Unaffiliated Customers by Geographic Area (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Revenue $ 18,517 $ 15,288
UNITED STATES    
Revenue 13,606 11,004
Asia Pacific [Member]    
Revenue 2,891 3,178
Europe And Middle East [Member]    
Revenue 1,369 667
CANADA    
Revenue 563 79
Latin America [Member]    
Revenue 51 360
Other [Member]    
Revenue $ 37