Selected Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Other Current Assets [Table Text Block]

Prepaid expenses and other current assets (in thousands):

	December 31,		December 31,
	2016		2015
Prepaid clinical research organizations	$	1,677	$	8,329
Prepaid insurances		358		339
Other prepaid expenses		295		208
Other receivables		185		-
Intrexon prepaid research and development expenses		-		643
Total	$	2,515	$	9,519

Property, Plant and Equipment [Table Text Block]

Property and equipment (in thousands):

	December 31,		December 31,
	2016		2015
Computer and office equipment	$	641	$	346
Software		11		11
Leasehold improvements		439		242
		1,091		599
Less accumulated depreciation and amortization		(186)		(105)
Total	$	905	$	494

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands):

	December 31,		December 31,
	2016		2015
Accrued manufacturing costs	$	14	$	-
Accrued vendor payments		400		133
Accrued clinical consulting  services		2,211		164
Other accrued expenses		2		-
Total	$	2,627	$	297