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Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid SCY-078 development services $ 153 $ 108
Prepaid insurance 243 285
Other prepaid expenses 71 91
Other receivable due from R-Pharm 233 430
Escrow receivable due from Accuratus (Note 13) 0 500
Other current assets 41 38
Total prepaid expenses and other current assets $ 741 $ 1,452