NATURE OF OPERATIONS AND ACCOUNTING POLICIES - Segment Info (Details)	12 Months Ended
	Dec. 26, 2015 USD ($) item	Dec. 27, 2014 USD ($)	Dec. 28, 2013 USD ($)
Segment Information
Net sales	$ 278,424,799	$ 236,308,920	$ 246,805,967
Specialized Vehicles
Segment Information
Number of product categories | item	3
Net sales	$ 274,563,033	234,182,656	244,636,013
Specialized Vehicles | Trucks
Segment Information
Net sales	261,598,525	211,975,917	225,778,360
Specialized Vehicles | Trolleys
Segment Information
Net sales	5,666,944	8,414,833	6,928,018
Specialized Vehicles | Specialty Vehicles
Segment Information
Net sales	7,297,564	13,791,906	11,929,635
Fiberglass Products
Segment Information
Net sales	$ 3,861,766	$ 2,126,264	$ 2,169,954