(Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid SCY-078 development services	$ 121	$ 153
Prepaid insurance	87	243
Other prepaid expenses	93	71
Other receivable due from R-Pharm	252	233
Other current assets	138	41
Total prepaid expenses and other current assets	$ 691	$ 741