Note 8 - Operating Segment Information - Information Related to the Operations of the Company's Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 95,870	$ 67,773	$ 251,349	$ 194,365
Gross margin	33,800	24,789	87,953	70,378
Selling, General and Administrative Expense, Total	25,482	17,386	69,991	51,809
Other periodic pension cost	96	348	289	1,046
Interest expense	940	213	1,974	593
Income before taxes on income	7,282	6,842	15,699	17,948
Depreciation and amortization	2,099	1,366	5,745	4,081
Capital expenditures	1,467	514	3,881	2,518
Total assets	335,030	205,325	335,030	205,325	$ 218,938
Gain (loss) on sale of property, plant and equipment				1,018
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	(1,026)	(927)	(3,065)	(2,795)
Gross margin	(666)	(600)	(2,007)	(1,817)
Selling, General and Administrative Expense, Total	(666)	(600)	(2,007)	(1,817)
Other periodic pension cost
Interest expense
Income before taxes on income
Depreciation and amortization
Capital expenditures
Total assets	(72,067)	(27,341)	(72,067)	(27,341)
Gain (loss) on sale of property, plant and equipment
Uniforms and Related Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	69,776		174,304
Uniforms and Related Products [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	69,776	51,854	174,304	152,297
Gross margin	24,551	18,640	61,268	53,795
Selling, General and Administrative Expense, Total	18,731	13,007	50,269	39,681
Other periodic pension cost	96	348	289	1,046
Interest expense	593	100	1,147	311
Income before taxes on income	5,131	5,185	9,563	12,755
Depreciation and amortization	1,510	1,044	4,024	3,143
Capital expenditures	885	246	2,278	1,890
Total assets	321,861	177,103	321,861	177,103
Gain (loss) on sale of property, plant and equipment				(2)
Remote Staffing Solutions [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	6,908		20,169
Remote Staffing Solutions [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	7,934	6,036	23,234	16,261
Gross margin	4,588	3,267	13,395	8,819
Selling, General and Administrative Expense, Total	2,856	2,023	8,146	5,489
Other periodic pension cost
Interest expense
Income before taxes on income	1,732	1,244	5,249	4,350
Depreciation and amortization	241	200	731	585
Capital expenditures	445	178	1,264	485
Total assets	27,626	20,618	27,626	20,618
Gain (loss) on sale of property, plant and equipment				1,020
Promotional Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	19,186		56,876
Promotional Products [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	19,186	10,810	56,876	28,602
Gross margin	5,327	3,482	15,297	9,581
Selling, General and Administrative Expense, Total	4,561	2,956	13,583	8,456
Other periodic pension cost
Interest expense	347	113	827	282
Income before taxes on income	419	413	887	843
Depreciation and amortization	348	122	990	353
Capital expenditures	137	90	339	143
Total assets	$ 57,610	$ 34,945	$ 57,610	34,945
Gain (loss) on sale of property, plant and equipment