Note 17 - Operating Segment Information - Information Related to the Operations of the Company's Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 95,001	$ 95,870	$ 82,392	$ 73,087	$ 72,450	$ 67,773	$ 65,604	$ 60,987	$ 64,686	$ 65,282	$ 64,660	$ 57,968	$ 346,350	$ 266,814	$ 252,596
Gross margin	33,744	$ 33,800	$ 29,278	$ 24,875	25,975	$ 24,789	$ 23,374	$ 22,214	22,058	$ 23,140	$ 21,763	$ 20,021	121,697	96,352	86,982
Selling, General and Administrative Expense, Total													96,710	70,592	65,124
Other periodic pension cost													385	1,224	1,272
Interest expense													3,207	802	688
Income before taxes on income													21,395	24,782	19,898
Depreciation and amortization													7,906	5,653	4,935
Capital expenditures													4,869	4,248	7,385
Total assets	335,086				218,938				196,848				335,086	218,938	196,848
Gain (loss) on sale of property, plant and equipment														1,048
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													(4,039)	(3,755)	(3,546)
Gross margin													(2,609)	(2,431)	(2,311)
Selling, General and Administrative Expense, Total													(2,609)	(2,431)	(2,311)
Other periodic pension cost
Interest expense
Income before taxes on income
Depreciation and amortization
Capital expenditures
Total assets	(87,610)				(40,528)				(27,454)				(87,610)	(40,528)	(27,454)
Gain (loss) on sale of property, plant and equipment
Uniforms and Related Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													238,166
Uniforms and Related Products [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													238,165	204,644	210,373
Gross margin													83,728	72,463	69,987
Selling, General and Administrative Expense, Total													68,848	52,967	50,953
Other periodic pension cost													385	1,224	1,272
Interest expense													2,019	387	462
Income before taxes on income													12,476	17,883	17,300
Depreciation and amortization													5,611	4,223	4,023
Capital expenditures													2,794	2,870	3,383
Total assets	331,113				182,623				176,070				331,113	182,623	176,070
Gain (loss) on sale of property, plant and equipment														(2)
Remote Staffing Solutions [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													27,272
Remote Staffing Solutions [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													31,311	23,021	17,953
Gross margin													17,907	12,460	9,616
Selling, General and Administrative Expense, Total													11,160	7,877	6,096
Other periodic pension cost
Interest expense
Income before taxes on income													6,747	5,633	3,520
Depreciation and amortization													990	846	494
Capital expenditures													1,581	1,156	3,872
Total assets	29,590				21,846				19,752				29,590	21,846	19,752
Gain (loss) on sale of property, plant and equipment														1,050
Promotional Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													80,912
Promotional Products [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total													80,913	42,904	27,816
Gross margin													22,671	13,860	9,690
Selling, General and Administrative Expense, Total													19,311	12,179	10,386
Other periodic pension cost
Interest expense													1,188	415	226
Income before taxes on income													2,172	1,266	(922)
Depreciation and amortization													1,299	584	418
Capital expenditures													494	219	130
Total assets	$ 61,993				$ 54,997				$ 28,480				$ 61,993	54,997	$ 28,480
Gain (loss) on sale of property, plant and equipment