Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net sales	$ 43,525	$ 35,775
Cutting, Sharpening and Measuring
Net sales	20,856	15,748
First Aid and Safety
Net sales	22,669	20,027
United States
Net sales	36,048	30,443
United States | Cutting, Sharpening and Measuring
Net sales	15,564	11,728
United States | First Aid and Safety
Net sales	20,484	18,715
Canada
Net sales	3,333	2,422
Canada | Cutting, Sharpening and Measuring
Net sales	1,549	1,422
Canada | First Aid and Safety
Net sales	1,784	1,000
Europe
Net sales	4,144	2,910
Europe | Cutting, Sharpening and Measuring
Net sales	3,743	2,598
Europe | First Aid and Safety
Net sales	$ 401	$ 312