Note 8 - Operating Segment Information - Information Related to the Operations of the Company's Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 82,392	$ 65,604	$ 155,479	$ 126,591
Gross margin	29,278	23,374	54,153	45,588
Selling, General and Administrative Expense, Total	23,327	16,994	44,509	34,423
Other periodic pension cost	96	484	192	698
Interest expense	758	195	1,035	379
Income before taxes on income	5,097	5,701	8,417	11,106
Depreciation and amortization	2,020	1,357	3,646	2,715
Capital expenditures	1,359	1,074	2,414	2,004
Total assets	335,162	198,183	335,162	198,183	$ 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)	(929)	(2,039)	(1,869)
Gross margin	(670)	(599)	(1,341)	(1,217)
Selling, General and Administrative Expense, Total	(670)	(599)	(1,341)	(1,217)
Other periodic pension cost
Interest expense
Income before taxes on income
Depreciation and amortization
Capital expenditures
Total assets	(53,743)	(26,590)	(53,743)	(26,590)
Gain (loss) on sale of property, plant and equipment
Uniforms and Related Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	56,403		104,528
Uniforms and Related Products [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	56,403	52,112	104,528	100,443
Gross margin	20,181	18,172	36,717	35,154
Selling, General and Administrative Expense, Total	17,399	13,138	31,538	26,674
Other periodic pension cost	96	484	192	698
Interest expense	495	107	555	210
Income before taxes on income	2,191	4,443	4,432	7,570
Depreciation and amortization	1,449	1,046	2,514	2,099
Capital expenditures	708	797	1,393	1,644
Total assets	303,099	174,008	303,099	174,008
Gain (loss) on sale of property, plant and equipment				(2)
Remote Staffing Solutions [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	6,975		13,261
Remote Staffing Solutions [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	8,001	5,562	15,300	10,225
Gross margin	4,646	3,005	8,807	5,552
Selling, General and Administrative Expense, Total	2,778	1,761	5,290	3,466
Other periodic pension cost
Interest expense
Income before taxes on income	1,868	1,244	3,517	3,106
Depreciation and amortization	253	197	490	385
Capital expenditures	554	253	819	307
Total assets	25,664	19,784	25,664	19,784
Gain (loss) on sale of property, plant and equipment				1,020
Promotional Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	19,014		37,690
Promotional Products [Member] | Operating Segments [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	19,014	8,859	37,690	17,792
Gross margin	5,121	2,796	9,970	6,099
Selling, General and Administrative Expense, Total	3,820	2,694	9,022	5,500
Other periodic pension cost
Interest expense	263	88	480	169
Income before taxes on income	1,038	14	468	430
Depreciation and amortization	318	114	642	231
Capital expenditures	97	24	202	53
Total assets	$ 60,142	$ 30,981	$ 60,142	30,981
Gain (loss) on sale of property, plant and equipment