Note 12 - Segment Information (Details) - Segment Reporting Information (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 122,021,000	$ 111,959,000
Operating income	3,289,000	2,904,000
Interest expense	158,000	171,000
Income tax expense	(948,000)	(1,118,000)
Net income from continuing operations	4,371,000	4,150,000
Depreciation and amortization	1,753,000	1,496,000
Capital expenditures	1,326,000	1,299,000
Other expense (income), net	(292,000)	(299,000)
Income before income tax expense	3,423,000	3,032,000
UNITED STATES
Segment Reporting Information [Line Items]
Revenue	46,404,000	44,577,000
Operating income	1,349,000	1,086,000
Interest expense	84,000	62,000
Income tax expense		(26,000)
Net income from continuing operations	2,828,000	2,751,000
Depreciation and amortization	1,294,000	1,171,000
Capital expenditures	1,011,000	1,064,000
Other expense (income), net	(1,563,000)	(1,701,000)
Income before income tax expense	1,265,000	1,050,000
International [Member]
Segment Reporting Information [Line Items]
Revenue	75,617,000	67,382,000
Operating income	1,940,000	1,818,000
Interest expense	74,000	109,000
Income tax expense	615,000	583,000
Net income from continuing operations	1,543,000	1,399,000
Depreciation and amortization	459,000	325,000
Capital expenditures	315,000	235,000
Other expense (income), net	(292,000)	(273,000)
Income before income tax expense	$ 2,158,000	$ 1,982,000