Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 164,003	$ 142,457
Cutting, Sharpening and Measuring
Net sales	84,082	79,929
First Aid and Safety
Net sales	79,921	62,528
United States
Net sales	140,191	125,717
United States | Cutting, Sharpening and Measuring
Net sales	65,805	63,189
United States | First Aid and Safety
Net sales	74,386	62,528
Europe
Net sales	12,826	10,062
Europe | Cutting, Sharpening and Measuring
Net sales	11,843	10,062
Europe | First Aid and Safety
Net sales	983	0
Canada
Net sales	10,986	6,678
Canada | Cutting, Sharpening and Measuring
Net sales	6,434	6,678
Canada | First Aid and Safety
Net sales	$ 4,552	$ 0