Note 8 - Operating Segment Information - Information Related to the Operations of the Company's Operating Segments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Net sales	$ 67,773,000	$ 65,282,000	$ 194,365,000	$ 187,910,000
Gross margin	24,789,000	23,140,000	70,378,000	64,924,000
Selling and administrative expenses	17,734,000	16,962,000	52,855,000	50,381,000
Interest expense	213,000	172,000	593,000	512,000
Income before taxes on income	6,842,000	6,006,000	17,948,000	14,031,000
Depreciation and amortization	1,366,000	1,283,000	4,081,000	3,602,000
Capital expenditures	514,000	1,064,000	2,518,000	6,596,000
Total assets	205,325,000	194,765,000	205,325,000	194,765,000	$ 196,848,000
Gain (loss) on sale of property, plant and equipment			1,018,000
Uniforms and Related Products [Member]
Net sales	51,854,000	55,341,000	152,297,000	157,247,000
Gross margin	18,640,000	19,043,000	53,795,000	52,615,000
Selling and administrative expenses	13,355,000	13,613,000	40,727,000	40,086,000
Interest expense	100,000	107,000	311,000	359,000
Income before taxes on income	5,185,000	5,323,000	12,755,000	12,170,000
Depreciation and amortization	1,044,000	1,023,000	3,143,000	2,995,000
Capital expenditures	246,000	851,000	1,890,000	2,680,000
Total assets	177,103,000	174,307,000	177,103,000	174,307,000
Gain (loss) on sale of property, plant and equipment			(2,000)
Remote Staffing Solutions [Member]
Net sales	6,036,000	4,624,000	16,261,000	13,482,000
Gross margin	3,267,000	2,465,000	8,819,000	7,247,000
Selling and administrative expenses	2,023,000	1,548,000	5,489,000	4,445,000
Interest expense
Income before taxes on income	1,244,000	917,000	4,350,000	2,802,000
Depreciation and amortization	200,000	133,000	585,000	317,000
Capital expenditures	178,000	184,000	485,000	3,821,000
Total assets	20,618,000	19,211,000	20,618,000	19,211,000
Gain (loss) on sale of property, plant and equipment			1,020,000
Promotional Products Segment [Member]
Net sales	10,810,000	6,215,000	28,602,000	19,854,000
Gross margin	3,482,000	2,220,000	9,581,000	6,806,000
Selling and administrative expenses	2,956,000	2,389,000	8,456,000	7,594,000
Interest expense	113,000	65,000	282,000	153,000
Income before taxes on income	413,000	(234,000)	843,000	(941,000)
Depreciation and amortization	122,000	127,000	353,000	290,000
Capital expenditures	90,000	29,000	143,000	95,000
Total assets	34,945,000	26,507,000	34,945,000	26,507,000
Gain (loss) on sale of property, plant and equipment
Intersegment Eliminations [Member]
Net sales	(927,000)	(898,000)	(2,795,000)	(2,673,000)
Gross margin	(600,000)	(588,000)	(1,817,000)	(1,744,000)
Selling and administrative expenses	(600,000)	(588,000)	(1,817,000)	(1,744,000)
Interest expense
Income before taxes on income
Depreciation and amortization
Capital expenditures
Total assets	$ (27,341,000)	$ (25,260,000)	(27,341,000)	$ (25,260,000)
Gain (loss) on sale of property, plant and equipment