Note 4 - Accrued Liabilities

3 Months Ended

Mar. 31, 2016

Notes to Financial Statements

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

4.         Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	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