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Notes Payable and Financing Obligations (Tables)
6 Months Ended
Jun. 30, 2017
Debt Disclosure [Abstract]  
Summary of Aggregate Total Future Minimum Lease Payments under the Financing Obligation
As of June 30, 2017, the aggregate total future minimum lease payments under the financing obligations were as follows (in thousands):
Year Ending December 31,
 
2017
$
1,897

2018
949

Total payments
$
2,846