Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net sales	$ 142,457	$ 137,321
Cutting, Sharpening and Measuring
Net sales	79,929	80,347
First Aid and Safety
Net sales	62,528	56,974
United States
Net sales	125,717	120,993
United States | Cutting, Sharpening and Measuring
Net sales	63,189	64,019
United States | First Aid and Safety
Net sales	62,528	56,974
Europe
Net sales	10,062	9,288
Europe | Cutting, Sharpening and Measuring
Net sales	10,062	9,288
Europe | First Aid and Safety
Net sales	0	0
Canada
Net sales	6,678	7,040
Canada | Cutting, Sharpening and Measuring
Net sales	6,678	7,040
Canada | First Aid and Safety
Net sales	$ 0	$ 0