Selected Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 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)

	June 30, 2018		December 31, 2017
Prepaid consulting, subscriptions and other expenses	$	230	$	290
Prepaid insurances		170		351
Prepaid conferences and travel		130		94
At the market subscription receivable		5		-
Clinical consulting services refund receivable		-		46
Prepaid clinical research organizations		-		46
Total	$	535	$	827

Property, Plant and Equipment [Table Text Block]

Property and equipment, net (in thousands)

	June 30, 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		(570	)		(429	)
Total	$	731		$	872

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands)

	June 30, 2018		December 31, 2017
Accrued clinical consulting services	$	625	$	658
Accrued vendor payments		221		193
Accrued manufacturing costs		143		661
Other accrued expenses		11		14
Total	$	1,000	$	1,526

Accrued Employee Benefits [Table Text Block]

Accrued employee benefits (in thousands)

	June 30, 2018		December 31, 2017
Accrued bonus expense	$	672	$	1,283
Accrued severance		395		590
Accrued vacation expense		295		201
Total	$	1,362	$	2,074