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Selected Balance Sheet Information (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Accrued Expenses [Line Items]    
Accrued manufacturing costs $ 14 $ 0
Accrued vendor payments 400 133
Accrued clinical consulting services 2,211 164
Other accrued expenses 2 0
Total $ 2,627 $ 297