Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net sales	$ 35,775	$ 31,370
Cutting, Sharpening and Measuring
Net sales	15,748	16,801
First Aid and Safety
Net sales	20,027	14,569
United States
Net sales	30,443	27,439
United States | Cutting, Sharpening and Measuring
Net sales	11,728	13,172
United States | First Aid and Safety
Net sales	18,715	14,267
Canada
Net sales	2,422	1,413
Canada | Cutting, Sharpening and Measuring
Net sales	1,422	1,413
Canada | First Aid and Safety
Net sales	1,000
Europe
Net sales	2,910	2,518
Europe | Cutting, Sharpening and Measuring
Net sales	2,598	2,216
Europe | First Aid and Safety
Net sales	$ 312	$ 302