Selected Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2018

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, 2018		December 31, 2017
Prepaid consulting, subscriptions and other expenses	$	265	$	290
Prepaid insurances		237		351
Prepaid conferences and travel		104		94
Clinical consulting services refund receivable		-		46
Prepaid clinical research organizations		-		46
Total	$	606	$	827

Property, Plant and Equipment [Table Text Block]

Property and equipment, net (in thousands)

	March 31, 2018		December 31  2017
Computers and office equipment	$	851	$	851
Leasehold improvements		439		439
Software		11		11
		1,301		1,301
Less: accumulated depreciation and amortization		(500)		(429)
Total	$	801	$	872

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands)

	March 31, 2018		December 31, 2017
Accrued clinical consulting services	$	621	$	658
Accrued vendor payments		376		193
Accrued manufacturing costs		55		661
Other accrued expenses		6		14
Total	$	1,058	$	1,526

Accrued Employee Benefits [Table Text Block]

Accrued employee benefits (in thousands)

	March 31, 2018		December 31, 2017
Accrued severance	$	412	$	590
Accrued bonus expense		336		1,283
Accrued vacation expense		268		201
Total	$	1,016	$	2,074