ORGANIZATION AND NATURE OF OPERATIONS (Detail Textuals)	12 Months Ended
Dec. 31, 2018 Distributor
Organization, Consolidation and Presentation Of Financial Statements [Abstract]
Number of independent distributors	80

Represents number of independent distributors for company's towing and recovery equipment.

No definition available.

Name:	mlr_NumberOfIndependentDistributor
Namespace Prefix:	mlr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration