Selected Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2017

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, 2017		December 31, 2016
Clinical consulting services refund receivable	$	612	$	-
Prepaid conferences, travel and other expenses		382		295
Grant receivable		315		185
Prepaid insurance		185		358
Prepaid clinical research organizations		46		1,677
Total	$	1,540	$	2,515

Property, Plant and Equipment [Table Text Block]

Property and equipment, net (in thousands)

	June 30,  2017		December 31,  2016
Computers and office equipment	$	653	$	641
Leasehold improvements		439		439
Software		11		11
		1,103		1,091
Less accumulated depreciation and amortization		(303)		(186)
Total	$	800	$	905

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands)

	June 30, 2017		December 31, 2016
Accrued clinical consulting services	$	1,129	$	2,211
Accrued manufacturing costs		368		14
Accrued vendor payments		249		400
Other accrued expenses		4		2
Total	$	1,750	$	2,627

Accrued Employee Benefits [Table Text Block]

Accrued employee benefits (in thousands)

	June 30, 2017		December 31, 2016
Accrued bonus expense	$	842	$	-
Accrued vacation expense		367		261
Other accrued employee benefits		-		52
Total	$	1,209	$	313