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REVENUE - Net sales by market (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Total Net Sales by Market | $ 113,370 | $ 112,335
Noncash Consideration |  |
Total Net Sales by Market | 4,876 |
Product/Service Transferred Over Time |  |
Total Net Sales by Market | 103,284 |
Product Transferred at Point in Time |  |
Total Net Sales by Market | 5,210 |
Aerospace and Defense |  |
Total Net Sales by Market | 18,314 | 15,683
Aerospace and Defense | Noncash Consideration |  |
Total Net Sales by Market | 819 |
Aerospace and Defense | Product/Service Transferred Over Time |  |
Total Net Sales by Market | 17,263 |
Aerospace and Defense | Product Transferred at Point in Time |  |
Total Net Sales by Market | 232 |
Medical |  |
Total Net Sales by Market | 45,082 | 51,449
Medical | Noncash Consideration |  |
Total Net Sales by Market | 1,854 |
Medical | Product/Service Transferred Over Time |  |
Total Net Sales by Market | 39,071 |
Medical | Product Transferred at Point in Time |  |
Total Net Sales by Market | 4,157 |
Industrial |  |
Total Net Sales by Market | 49,974 | $ 45,203
Industrial | Noncash Consideration |  |
Total Net Sales by Market | 2,203 |
Industrial | Product/Service Transferred Over Time |  |
Total Net Sales by Market | 46,950 |
Industrial | Product Transferred at Point in Time |  |
Total Net Sales by Market | $ 821 |

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