Revenue from Contracts with Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Total Net Sales	$ 31,709	$ 27,745
United States
Total Net Sales	27,777	24,475
Canada
Total Net Sales	1,552	1,391
Europe
Total Net Sales	2,380	$ 1,879
Cutting and Sharpening
Total Net Sales	16,428
Cutting and Sharpening | United States
Total Net Sales	12,496
Cutting and Sharpening | Canada
Total Net Sales	1,552
Cutting and Sharpening | Europe
Total Net Sales	2,380
First Aid and Safety
Total Net Sales	15,281
First Aid and Safety | United States
Total Net Sales	$ 15,281