Quarterly Financial Information (unaudited) - Selected Consolidated Statements of Operations Data (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016	Jan. 31, 2016	Oct. 29, 2017	Oct. 30, 2016	Nov. 01, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Revenues	$ 288,483	$ 289,924	$ 303,005	$ 313,024	$ 341,578	$ 330,625	$ 335,576	$ 326,968	$ 1,194,436	$ 1,334,747	$ 1,496,897
REVENUE:
Cost of services	240,816	244,205	255,886	266,134	284,651	282,098	284,104	281,400	1,007,041	1,132,253	1,268,363
Gross Profit	47,667	45,719	47,119	46,890	56,927	48,527	51,472	45,568	187,395	202,494	228,534
EXPENSES
Selling, administrative and other operating costs	50,138	46,931	51,171	48,890	50,636	49,543	51,128	52,623	197,130	203,930	231,033
Restructuring and severance costs	307	249	199	624	1,181	970	840	2,761	1,379	5,752	3,635
Gain from divestitures	(48,033)	0	(3,938)	0	0	0	(1,663)	0	(51,971)	(1,663)	0
Settlement and impairment charges	1,404	0	290	0	364	0	0	0	1,694	364	6,626
TOTAL EXPENSES	3,816	47,180	47,722	49,514	52,181	50,513	50,305	55,384	148,232	208,383	241,294
OPERATING INCOME (LOSS)	43,851	(1,461)	(603)	(2,624)	4,746	(1,986)	1,167	(9,816)	39,163	(5,889)	(12,760)
OTHER INCOME (EXPENSE):
Interest income	(1)	1	8	31	17	18	37	74	39	146
Interest expense	(1,025)	(977)	(899)	(889)	(830)	(844)	(899)	(732)	(3,790)	(3,305)	(3,244)
Foreign exchange gain (loss), net	(218)	(1,730)	184	127	(565)	(1,003)	(579)	344	(1,637)	(1,803)	(249)
Other income (expense), net	(375)	(277)	(311)	(599)	(443)	(402)	(420)	(279)	(1,562)	(1,544)	541
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	42,232	(4,444)	(1,621)	(3,954)	2,925	(4,217)	(694)	(10,409)	32,213	(12,395)	(15,140)
Income tax provision	2,458	1,074	(767)	623	138	393	1,091	553	3,388	2,175	4,646
INCOME (LOSS) FROM CONTINUING OPERATIONS	39,774	(5,518)	(854)	(4,577)	$ 2,787	$ (4,610)	$ (1,785)	$ (10,962)	28,825	(14,570)	(19,786)
Loss from discontinued operations, net of income taxes	(1,693)	0	0	0					(1,693)	0	(4,834)
NET INCOME (LOSS)	$ 38,081	$ (5,518)	$ (854)	$ (4,577)					$ 27,132	$ (14,570)	$ (24,620)
Basic:
Income (loss) from continuing operations, basic (USD per share)	$ 1.90	$ (0.26)	$ (0.04)	$ (0.22)	$ 0.13	$ (0.22)	$ (0.09)	$ (0.53)	$ 1.38	$ (0.70)	$ (0.95)
Loss from discontinued operations (USD per share)	(0.08)	0.00	0.00	0.00					(0.08)	0.00	(0.23)
Net Income (loss) (USD per share)	$ 1.82	$ (0.26)	$ (0.04)	$ (0.22)					$ 1.30	$ (0.70)	$ (1.18)
Weighted average number of shares (shares)	20,967	20,963	20,921	20,918	20,852	20,846	20,814	20,813	20,942	20,831	20,816
Diluted:
Income (loss) from continuing operations, diluted (USD per share)	$ 1.90	$ (0.26)	$ (0.04)	$ (0.22)	$ 0.13	$ (0.22)	$ (0.09)	$ (0.53)	$ 1.37	$ (0.70)	$ (0.95)
Loss from discontinued operations (USD per share)	(0.08)	0.00	0.00	0.00					(0.08)	0.00	(0.23)
Net Income (loss) (USD per share)	$ 1.82	$ (0.26)	$ (0.04)	$ (0.22)					$ 1.29	$ (0.70)	$ (1.18)
Weighted average number of shares (shares)	20,982	20,963	20,921	20,918	21,762	20,846	20,814	20,813	21,017	20,831	20,816