Note 5 - Accrued Liabilities

9 Months Ended

Sep. 30, 2014

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

5. Accrued liabilities

Accrued liabilities consisted of the following as of:

(in thousands)	September 30, 2014		December 31, 2013
Employee related expenses	$	3,278	$	2,766
Royalties		1,390		2,064
Professional services		433		99
Rent		256		366
Inventory		136		293
Accrued initial public offering costs		—		845
Other accrued liabilities		684		503
Total accrued liabilities	$	6,177	$	6,936