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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Contractual Obligation, Fiscal Year Maturity Schedule
Minimum future payments on noncancelable operating and capital leases are as follows:
Year Ending December 31,
Operating Leases
 
Capital Leases
2019
$
32

 
$
2

2020
30

 
—

2021
24

 
—

2022
16

 
—

2023 and thereafter
46

 
—

Total minimum lease payments
148

 
2

Less: Amounts representing interest
—

 
—

Present value of minimum lease payments
$
148

 
$
2