Selected Balance Sheet Information (Tables)

3 Months Ended

Mar. 31, 2019

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, 2019		December 31, 2018
Prepaid manufacturing expenses	$	415	$	-
Prepaid insurances		287		419
Prepaid consulting, subscriptions and other expenses		127		132
Prepaid clinical research organizations		22		-
Prepaid conferences, travel		3		42
Other receivables		6		-
Total	$	860	$	593

Property, Plant and Equipment [Table Text Block]

Property and equipment, net (in thousands)

	March 31, 2019			December 31, 2018
Computers and office equipment	$	852		$	852
Leasehold improvements		439			439
Software		11			11
		1,302			1,302
Less: accumulated depreciation and amortization		(757	)		(695	)
Total	$	545		$	607

Accrued Expenses [Table Text Block]

Accrued expenses (in thousands)

	March 31, 2019		December 31, 2018
Accrued manufacturing costs	$	705	$	83
Accrued clinical consulting services		690		674
Accrued vendor payments		229		150
Other accrued expenses		6		12
Total	$	1,630	$	919

Accrued Employee Benefits [Table Text Block]

Accrued employee benefits (in thousands)

	March 31, 2019		December 31, 2018
Accrued bonus expense	$	215	$	907
Accrued vacation expense		124		118
Accrued severance		2		307
Total	$	341	$	1,332