Note 17 - Operating Segment Information - Information Related to the Operations of the Company's Operating Segments (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales													$ 252,596,000	$ 210,317,000	$ 196,249,000
Gross margin	$ 22,058,000	$ 23,140,000	$ 21,763,000	$ 20,021,000	$ 17,882,000	$ 19,224,000	$ 18,531,000	$ 15,796,000	$ 17,242,000	$ 18,433,000	$ 19,006,000	$ 14,056,000	86,982,000	71,433,000	68,737,000
Selling and administrative expenses													66,396,000	52,018,000	50,724,000
Interest expense													688,000	519,000	484,000
Income before taxes on income (loss)													19,898,000	18,896,000	17,529,000
Depreciation and amortization													4,935,000	3,873,000	3,839,000
Capital expenditures													7,385,000	8,069,000	4,936,000
Total assets	196,848,000				151,731,000				139,854,000				196,848,000	151,731,000	139,854,000
Uniforms and Related Products [Member]
Net sales													210,373,000	198,319,000	188,199,000
Gross margin													69,987,000	65,247,000	64,480,000
Selling and administrative expenses													52,225,000	49,225,000	48,924,000
Interest expense													462,000	519,000	484,000
Income before taxes on income (loss)													17,300,000	15,503,000	15,072,000
Depreciation and amortization													4,023,000	3,561,000	3,581,000
Capital expenditures													3,383,000	3,003,000	2,187,000
Total assets	176,070,000				140,710,000				131,627,000				176,070,000	140,710,000	131,627,000
Remote Staffing Solutions [Member]
Net sales													17,953,000	15,604,000	11,424,000
Gross margin													9,616,000	8,579,000	6,487,000
Selling and administrative expenses													6,096,000	5,186,000	4,030,000
Interest expense
Income before taxes on income (loss)													3,520,000	3,393,000	2,457,000
Depreciation and amortization													494,000	312,000	258,000
Capital expenditures													3,872,000	5,066,000	2,749,000
Total assets	19,752,000				14,551,000				9,797,000				19,752,000	14,551,000	9,797,000
Promotional Products Segment [Member]
Net sales													27,816,000
Gross margin													9,690,000
Selling and administrative expenses													10,386,000
Interest expense													226,000
Income before taxes on income (loss)													(922,000)
Depreciation and amortization													418,000
Capital expenditures													130,000
Total assets	28,480,000												28,480,000
Intersegment Eliminations [Member]
Net sales													(3,546,000)	(3,606,000)	(3,374,000)
Gross margin													(2,311,000)	(2,393,000)	(2,230,000)
Selling and administrative expenses													(2,311,000)	(2,393,000)	(2,230,000)
Interest expense
Income before taxes on income (loss)
Depreciation and amortization
Capital expenditures
Total assets	$ (27,454,000)				$ (3,530,000)				$ (1,570,000)				$ (27,454,000)	$ (3,530,000)	$ (1,570,000)