Selected Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 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):

	December 31, 2017		December 31, 2016
Prepaid insurance	$	351	$	358
Other prepaid expenses		290		185
Prepaid conferences, travel and other expenses		94		295
Clinical consulting services refund receivable		46		-
Prepaid clinical research organizations		46		1,677
Total	$	827	$	2,515

Property, Plant and Equipment [Table Text Block]

Property and equipment (in thousands):

	December 31, 2017		December 31, 2016
Computer and office equipment	$	851	$	641
Leasehold improvements		439		439
Software		11		11
		1,301		1,091
Less accumulated depreciation and amortization		(429)		(186)
Total	$	872	$	905

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands):

	December 31, 2017		December 31, 2016
Accrued manufacturing costs	$	661	$	14
Accrued clinical consulting services		658		2,211
Accrued vendor payments		193		400
Other accrued expenses		14		2
Total	$	1,526	$	2,627

Accrued Employee Benefits [Table Text Block]

Accrued employee benefits (in thousands)

	December 31, 2017		December 31, 2016
Accrued bonus expense	$	1,283	$	-
Accrued severance expense		590		52
Accrued vacation expense		201		261
Total	$	2,074	$	313