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
	Nov. 03, 2019	Jul. 28, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 28, 2018	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Nov. 03, 2019	Oct. 28, 2018
Condensed Financial Information Disclosure [Abstract]
NET REVENUE	$ 258,408	$ 233,176	$ 252,070	$ 253,436	$ 264,805	$ 257,808	$ 263,219	$ 253,338	$ 997,090	$ 1,039,170
Cost of services	215,449	197,528	215,813	215,737	220,797	221,448	225,918	217,329	844,527	885,492
GROSS MARGIN	42,959	35,648	36,257	37,699	44,008	36,360	37,301	36,009	152,563	153,678
Selling, administrative and other operating costs	39,908	38,395	38,939	39,810	41,261	42,222	42,916	46,938	157,052	173,337
Restructuring and severance costs	1,856	2,017	724	59	4,512	3,108	104	518	4,656	8,242
Impairment charges	262	79	347	0	351	0	155	0	688	506
Operating income (loss)	933	(4,843)	(3,753)	(2,170)	(2,116)	(8,970)	(5,874)	(11,447)	(9,833)	(28,407)
Interest income	66	87	66	55	54	50	47	22	274	173
Interest expense	(789)	(801)	(765)	(801)	(681)	(602)	(678)	(804)	(3,156)	(2,765)
Foreign exchange gain (loss), net	(360)	(151)	(314)	213	491	(294)	(497)	703	(612)	403
Other income (expense), net	(292)	(184)	(166)	(239)	(252)	(296)	(55)	(528)	(881)	(1,131)
LOSS BEFORE INCOME TAXES	(442)	(5,892)	(4,932)	(2,942)	(2,504)	(10,112)	(7,057)	(12,054)	(14,208)	(31,727)
Income tax provision	307	165	233	273	382	1,306	630	(1,360)	978	958
NET LOSS	$ (749)	$ (6,057)	$ (5,165)	$ (3,215)	$ (2,886)	$ (11,418)	$ (7,687)	$ (10,694)	$ (15,186)	$ (32,685)
Basic:
Net loss (USD per share)	$ (0.04)	$ (0.29)	$ (0.24)	$ (0.15)	$ (0.14)	$ (0.54)	$ (0.37)	$ (0.51)	$ (0.72)	$ (1.55)
Weighted average number of shares (shares)	21,157	21,157	21,082	21,080	21,072	21,071	21,032	21,029	21,119	21,051
Diluted:
Net loss (USD per share)	$ (0.04)	$ (0.29)	$ (0.24)	$ (0.15)	$ (0.14)	$ (0.54)	$ (0.37)	$ (0.51)	$ (0.72)	$ (1.55)
Weighted average number of shares (shares)	21,157	21,157	21,082	21,080	21,072	21,071	21,032	21,029	21,119	21,051