Revenue from Contracts with Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Total Net Sales	$ 34,731	$ 33,785	$ 106,191	$ 100,380
United States
Total Net Sales	30,913	30,038	93,468	88,653
Canada
Total Net Sales	1,691	1,661	5,715	5,556
Europe
Total Net Sales	2,127	$ 2,086	7,008	$ 6,171
Cutting and Sharpening
Total Net Sales	20,194		61,403
Cutting and Sharpening | United States
Total Net Sales	16,376		48,680
Cutting and Sharpening | Canada
Total Net Sales	1,691		5,715
Cutting and Sharpening | Europe
Total Net Sales	2,127		7,008
First Aid and Safety
Total Net Sales	14,537		44,788
First Aid and Safety | United States
Total Net Sales	$ 14,537		$ 44,788