Selected Balance Sheet Information (Tables)

6 Months Ended

Jun. 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)

	June 30, 2015		December 31, 2014
Intrexon prepaid research and development expenses	$	1,049	$	1,067
Prepaid Clinical Research Organization expenses		5,458		-
Prepaid insurance		133		228
Other prepaid expenses		315		253
Total	$	6,955	$	1,548

Property, Plant and Equipment [Table Text Block]

Property and equipment (in thousands)

	June 30, 2015		December 31, 2014
Computer and office equipment	$	154	$	93
Software		11		11
		165		104
Less accumulated depreciation		(58)		(39)
Total	$	107	$	65

Accrued Expenses [Table Text Block]

Accrued Expenses (in thousands)

	June 30, 2015		December 31, 2014
Accrued manufacturing costs	$	105	$	247
Accrued vendor payments		470		176
Accrued milestone payments		-		350
Accrued clinical consulting services		1,040		525
Total	$	1,615	$	1,298