v3.10.0.1
Geographic Information - Net Sales by Geographic Region based on Location of Sales Organization (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Net sales by geographic region        
Revenues $ 2,433 $ 3,556 $ 4,630 $ 7,405
United States        
Net sales by geographic region        
Revenues 894 2,063 1,661 4,585
Canada        
Net sales by geographic region        
Revenues 339 475 603 741
Europe        
Net sales by geographic region        
Revenues 1,172 1,018 2,290 1,946
Asia        
Net sales by geographic region        
Revenues 28 0 76 133
Total international        
Net sales by geographic region        
Revenues $ 1,539 $ 1,493 $ 2,969 $ 2,820