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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies [Abstract]  
Future Minimum Annual Lease Payments
Future minimum annual lease payments under Lease Schedule No.’s 1, 2, and 3 above for the years ending after December 31, 2017 are as follows (in thousands):
 

Year Ending
December 31,
 
Capital Lease
Payments
 
2018
 
$
383
 
2019
  
248
 
2020
  
59
 
 
Total minimum lease payments
 
 
690
 
 
Less amounts representing interest
  
(63
)
 
Present value of net minimum lease payments
 
$
627