Note 8 - Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Inventory	$ 976	$ 569
Net operating loss carryforwards	1,421	1,898
Tax credit carryforwards	828	760
Capital loss carryforwards	279	1,168
Reserves and accruals	802	629
Intangible assets	2,737	1,138
Stock options	373	322
Other	91	65
Total deferred tax assets	7,507	6,549
Deferred tax liabilities:
Property and equipment	(1,416)	(1,203)
Goodwill	(3,023)	(2,932)
Foreign branch deferred offset	(1,032)	(1,177)
Other	(50)	(44)
Total deferred tax liabilities	(5,521)	(5,356)
Net deferred tax assets before valuation allowance	1,986	1,193
Valuation allowance	(1,255)	(1,991)
Net deferred tax asset	731
Net deferred tax liabiltity		(798)
Deferred tax classification
Long-term deferred tax asset	1,215	1,378
Long-term deferred tax liability	(484)	(2,176)
Net long-term deferred tax asset	$ 731
Net long-term deferred tax liability		$ (798)