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COMMITMENTS AND CONTINGENCIES (Details)
 12 Months Ended
Dec. 31, 2018
USD ($)
item
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Commitments      
Pension expense $ 295,000 $ 275,000 $ 273,000
Annual fixed leasehold rent through July 2019 371,094    
Annual fixed leasehold rent thereafter through March 3, 2020 $ 463,867    
Number of 5-year extension options | item 5    
Lease extension period for the first five renewal options 5 years    
Number of seven month extension options | item 1    
Lease extension period for the last renewal option 7 months    
Building Located In Hauppauge New York | Building expansion and improvements      
Commitments      
Contractual obligation $ 791,000