Note 6 - Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	March 31,		December 31,
	2018		2017
Accrued compensation and benefits	$	726	$	967
Accrued rent payable		191		205
Accrued clinical trials services		15		75
Accrued inventory supplies		159		391
Accrued other		808		883
Total accrued expenses	$	1,899	$	2,521