Note 7 - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 58	$ 71
Accrued expenses	578	529
Share based compensation	1,796	1,239
Accrued bonuses	618
Other	94	38
Deferred tax assets	3,144	1,877
Prepaid expenses	261	251
Property and equipment	943	1,319
Intangible assets	7,616	7,308
Other	68	82
Deferred tax liabilities	8,888	8,960
Net deferred tax liabilities	$ (5,744)	$ (7,083)