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 |