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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of future minimum payments for operating leases
uture minimum payments under the operating lease agreements with non-cancelable terms greater than one year are as follows (in thousands):
Year Ending December 31,
 
2019
$
890

2020
139

2021
0

 
$
1,029