Revenue from Contracts with Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Total Net Sales	$ 39,751	$ 38,849	$ 71,460	$ 66,595
United States
Total Net Sales	34,778	34,140	62,555	58,615
Canada
Total Net Sales	2,472	2,503	4,024	3,895
Europe
Total Net Sales	2,501	$ 2,206	4,881	$ 4,085
Cutting and Sharpening
Total Net Sales	24,781		41,209
Cutting and Sharpening | United States
Total Net Sales	19,808		32,304
Cutting and Sharpening | Canada
Total Net Sales	2,472		4,024
Cutting and Sharpening | Europe
Total Net Sales	2,501		4,881
First Aid and Safety
Total Net Sales	14,970		30,251
First Aid and Safety | United States
Total Net Sales	$ 14,970		$ 30,251