Note 15 - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Accrued expenses	$ 628	$ 378
Warrants and stock options	2,828	2,152
Intangibles	499	319
Inventories	177	172
Other assets	856	527
Net operating loss	2,409	2,842
Less valuation allowance	(2,625)	(3,048)
Total deferred tax assets	4,772	3,342
Deferred tax liabilities:
Depreciation	(7,945)	(4,246)
Goodwill	(1,067)	(430)
Total deferred tax liabilities	(9,012)	(4,676)
Net deferred tax liability	$ (4,240)	$ (1,334)