Note 5 - Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2014

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

(in thousands)	June 30, 2014		December 31, 2013
Employee related expenses	$	2,553	$	2,766
Royalties		818		2,064
Inventory		362		293
Rent		226		366
Professional services		184		99
Accrued initial public offering costs		—		845
Other accrued liabilities		527		503
Total accrued liabilities	$	4,670	$	6,936