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MARKETABLE SECURITIES (Tables)
6 Months Ended
Jun. 30, 2017
MARKETABLE SECURITIES  
Schedule of net realized gains and reclassification of net realized gains from other comprehensive income
  Three months ended  Six months ended 
  June 30,  June 30, 
(in thousands) 2017  2016  2017  2016 
Net realized gain $2  $14  $12  $14 
Reclassification of net realized gains from other comprehensive income $2  $14  $12  $14 
Schedule of gross unrealized gains (losses) on marketable securities
  June 30, 2017  December 31, 2016 
  Gross unrealized  Gross unrealized 
(in thousands) Gains  (Losses)  Gains  (Losses) 
Municipal Obligations $20  $(15) $4  $(53)
Corporate Obligations  -   -   -   - 
  $20  $(15) $4  $(53)
Schedule of amortized cost basis, fair value and net unrealized gains on available-for-sale securities
 June 30, 2017  December 31, 2016 
Type of Securities Amortized
Cost Basis
  Fair
Value
  Net
Unrealized
Gains
  Amortized
Cost Basis
  Fair
Value
  Net
Unrealized
Losses
 
(in thousands)                  
Municipal Obligations $17,782  $17,787  $5  $9,379  $9,330  $(49)
Corporate Obligations  -   -   -   -   -   - 
Total $17,782  $17,787  $5  $9,379  $9,330  $(49)