Selected Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Other Current Assets [Table Text Block]

Prepaid expenses and other current assets (in thousands)

	September 30, 2015		December 31, 2014
Intrexon prepaid research and development expenses	$	950	$	1,067
Prepaid Clinical Research Organization expenses		9,089		-
Prepaid insurance		65		228
Other prepaid expenses		227		253
Total	$	10,331	$	1,548

Property, Plant and Equipment [Table Text Block]

Property and equipment (in thousands)

	September 30, 2015		December 31, 2014
Computer and office equipment	$	302	$	93
Software		11		11
Leasehold improvements		242		-
		555		104
Less accumulated depreciation and amortization		(72)		(39)
Total	$	483	$	65

Accrued Expenses [Table Text Block]

Accrued Expenses (in thousands)

	September 30, 2015		December 31, 2014
Accrued manufacturing costs	$	-	$	247
Accrued vendor payments		116		176
Accrued milestone payments		-		350
Accrued clinical consulting services		128		525
Total	$	244	$	1,298