Note 7 - Accrued Liabilities

12 Months Ended

Dec. 31, 2016

Notes to Financial Statements

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

7.

Accrued liabilities

Accrued liabilities consist of the following as of:

	December 31,
(in thousands)	201 6		201 5
Employee related expenses	$	6,592	$	4,478
Royalties		4,423		3,498
Clinical trials		1,135		442
Professional services		387		333
Sales and use taxes payable		155		193
Other accrued liabilities		1,590		1,005
Total accrued liabilities	$	14,282	$	9,949