Selected Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 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):

	March 31, 2015		December 31, 2014
Intrexon prepaid research and development expenses	$	1,060	$	1,067
Prepaid insurance		140		228
Prepaid expenses		374		253
Total	$	1,574	$	1,548

Property, Plant and Equipment [Table Text Block]

Property and equipment (in thousands):   

	March 31, 2015		December 31, 2014
Computer and office equipment	$	111	$	93
Software		11		11
		122		104
Less accumulated depreciation		(47)		(39)
Total	$	75	$	65

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands):

	March 31, 2015		December 31, 2014
Accrued manufacturing costs	$	74	$	247
Accrued vendor payments		225		176
Accrued milestone payments		1,000		350
Accrued clinical consulting services		1,347		525
Total	$	2,646	$	1,298