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PATENTS (Tables)
 12 Months Ended
Dec. 31, 2017
Patents Tables  
Accumulated amortization related to acquired intangible assets

    2017     2016  
                 
Gross carrying amount   $ 7,571,000     $ 6,427,000  
Accumulated amortization     (5,402,000 )     (5,196,000 )
Patents, net   $ 2,169,000     $ 1,231,000  
                 
Future amortization of current intangible assets, net

For the year ended December 31,      
2018   $ 278,000  
2019   $ 272,000  
2020   $ 272,000  
2021   $ 266,000  
2022 and thereafter   $ 1,081,000  
Total   $ 2,169,000