Note 4 - Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	2017		2016
Accrued compensation and related expenses	$	234	$	413
Accrued professional fees		32		95
Accrued building construction fees		-		521
Accrued clinical trial expenses		766		2,402
Other		30		101
Total	$	1,062	$	3,532