REVENUE - Net sales by market (Details) - USD ($) $ in Thousands	12 Months Ended
	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