MARKETABLE SECURITIES (Tables)
 3 Months Ended
Mar. 31, 2018
MARKETABLE SECURITIES  
Schedule of net realized gains and reclassification of net realized gains from other comprehensive income
    Three months ended  
    March 31,  
(in thousands)   2018     2017  
Net realized (loss) gain   $ (19 )   $ 10  
Reclassification of net realized (losses) gains from other comprehensive income   $ (19 )   $ 10  
Schedule of gross unrealized gains (losses) on marketable securities
    March 31, 2018     December 31, 2017  
    Gross unrealized     Gross unrealized  
(in thousands)   Gains     (Losses)     Gains     (Losses)  
Municipal Obligations   $ -     $ (56 )   $ -     $ (70 )
Corporate Obligations     -       (2 )     -       -  
    $ -     $ (58 )   $ -     $ (70 )
Schedule of amortized cost basis, fair value and net unrealized gains on available-for-sale securities
    March 31, 2018     December 31, 2017  
Type of Securities  

Amortized

Cost Basis

    

Fair

Value

    

Net

Unrealized

Losses

     Amortized 
Cost Basis		     Fair 
Value		     Net 
Unrealized 
Losses		  
(in thousands)                                    
Municipal Obligations   $ 9,820     $ 9,764     $ (56 )   $ 13,101     $ 13,031     $ (70 )
Corporate Obligations     1,750       1,748       (2 )     -       -       -  
Total   $ 11,570     $ 11,512     $ (58 )   $ 13,101     $ 13,031     $ (70 )