Note 5 - Accrued Liabilities (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2016

Dec. 31, 2015

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	March 31,		December 31,
	2016		2015
Customer advance payments	$	1,418	$	20
Accrued professional fees		432		388
Accrued bonuses		164		613
Accrued vacation		121		68
Accrued clinical trial costs		89		112
Other accruals		184		92
Total accrued liabilities	$	2,408	$	1,293

	December 31, 2015		December 31, 2014
Accrued professional fees	$	388	$	117
Accrued clinical trial costs		112		-
Accrued bonuses		613		-
Accrued vacation		68		86
Other accruals		112		20
Total accrued liabilities	$	1,293	$	223