Quarterly Financial Information (unaudited) - Selected Consolidated Statements of Operations Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 28, 2018	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 28, 2018	Oct. 29, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
NET REVENUE	$ 264,805	$ 257,808	$ 263,219	$ 253,338	$ 288,483	$ 289,924	$ 303,005	$ 313,024	$ 1,039,170	$ 1,194,436
Cost of services	220,797	221,448	225,918	217,329	240,816	244,205	255,886	266,134	885,492	1,007,041
GROSS MARGIN	44,008	36,360	37,301	36,009	47,667	45,719	47,119	46,890	153,678	187,395
Selling, administrative and other operating costs	41,261	42,222	42,916	46,938	50,138	46,931	51,171	48,890	173,337	197,130
Restructuring and severance costs	4,512	3,108	104	518	307	249	199	624	8,242	1,379
Gain from divestitures					(48,033)	0	(3,938)	0	0	(51,971)
Settlement and impairment charges	351	0	155	0	1,404	0	290	0	506	1,694
OPERATING INCOME (LOSS)	(2,116)	(8,970)	(5,874)	(11,447)	43,851	(1,461)	(603)	(2,624)	(28,407)	39,163
Interest income	54	50	47	22	(1)	1	8	31
Interest expense	(681)	(602)	(678)	(804)	(1,025)	(977)	(899)	(889)	(2,765)	(3,790)
Foreign exchange gain (loss), net	491	(294)	(497)	703	(218)	(1,730)	184	127	403	(1,637)
Other income (expense), net	(252)	(296)	(55)	(528)	(375)	(277)	(311)	(599)	(1,131)	(1,562)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(2,504)	(10,112)	(7,057)	(12,054)	42,232	(4,444)	(1,621)	(3,954)	(31,727)	32,213
Income tax provision	382	1,306	630	(1,360)	2,458	1,074	(767)	623	958	3,388
INCOME (LOSS) FROM CONTINUING OPERATIONS	$ (2,886)	$ (11,418)	$ (7,687)	$ (10,694)	39,774	(5,518)	(854)	(4,577)	(32,685)	28,825
Loss from discontinued operations, net of income taxes					(1,693)	0	0	0	0	(1,693)
NET INCOME (LOSS)					$ 38,081	$ (5,518)	$ (854)	$ (4,577)	$ (32,685)	$ 27,132
Basic:
Income (loss) from continuing operations, basic (USD per share)	$ (0.14)	$ (0.54)	$ (0.37)	$ (0.51)	$ 1.90	$ (0.26)	$ (0.04)	$ (0.22)	$ (1.55)	$ 1.38
Loss from discontinued operations (USD per share)					(0.08)	0.00	0.00	0.00	0.00	(0.08)
Net Income (loss) (USD per share)					$ 1.82	$ (0.26)	$ (0.04)	$ (0.22)	$ (1.55)	$ 1.30
Weighted average number of shares (shares)	21,072	21,071	21,032	21,029	20,967	20,963	20,921	20,918	21,051	20,942
Diluted:
Income (loss) from continuing operations, diluted (USD per share)	$ (0.14)	$ (0.54)	$ (0.37)	$ (0.51)	$ 1.90	$ (0.26)	$ (0.04)	$ (0.22)	$ (1.55)	$ 1.37
Loss from discontinued operations (USD per share)					(0.08)	0.00	0.00	0.00	0.00	(0.08)
Net Income (loss) (USD per share)					$ 1.82	$ (0.26)	$ (0.04)	$ (0.22)	$ (1.55)	$ 1.29
Weighted average number of shares (shares)	21,072	21,071	21,032	21,029	20,982	20,963	20,921	20,918	21,051	21,017