Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($) segment	Sep. 30, 2017 USD ($)	Mar. 31, 2018 USD ($)	Oct. 01, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment			4
Revenues	$ 158,658	$ 164,465	$ 321,152	$ 325,210
Gross profit	43,365	49,322	89,660	94,309
Operating income (loss)	(9,424)	(8,899)	(15,938)	(23,692)
Depreciation	1,983	2,167	4,111	4,499
Intangibles amortization	1,075	1,716	2,153	3,551
Restructuring expense	185	147	383	4,469
Asset impairment loss	1,586	1,426	1,586	1,426
Capital expenditures	382	1,553	769	2,327
Assets	297,764		297,764		$ 376,335	$ 382,847
North America Products
Segment Reporting Information [Line Items]
Restructuring expense		(659)	9
North America Services
Segment Reporting Information [Line Items]
Restructuring expense		697	223
International Products
Segment Reporting Information [Line Items]
Restructuring expense		(1,073)	125
International Services
Segment Reporting Information [Line Items]
Restructuring expense		1,182	26
Operating Segments | North America Products
Segment Reporting Information [Line Items]
Revenues	16,845	19,858	32,645	37,121
Gross profit	7,520	9,145	14,272	16,924
Operating income (loss)	(500)	1,848	(1,768)	374
Depreciation	447	451	912	900
Intangibles amortization	0	0	0	0
Restructuring expense	9			647
Asset impairment loss	0	0	0	0
Capital expenditures	105	204	251	333
Assets	40,207		40,207			62,527
Operating Segments | North America Services
Segment Reporting Information [Line Items]
Revenues	116,280	118,834	236,743	240,565
Gross profit	27,379	31,365	58,491	61,279
Operating income (loss)	(8,025)	(8,704)	(12,133)	(17,956)
Depreciation	1,310	1,434	2,716	3,076
Intangibles amortization	1,075	1,591	2,153	3,313
Restructuring expense	75			1,975
Asset impairment loss	1,586	1,426	1,586	1,426
Capital expenditures	165	971	328	1,347
Assets	209,789		209,789			261,777
Operating Segments | International Products
Segment Reporting Information [Line Items]
Revenues	15,991	17,390	31,743	33,015
Gross profit	6,442	6,937	13,024	13,019
Operating income (loss)	(694)	(361)	(1,092)	(4,102)
Depreciation	140	175	287	339
Intangibles amortization	0	125	0	238
Restructuring expense	101			640
Asset impairment loss	0	0	0	0
Capital expenditures	49	120	105	373
Assets	35,691		35,691			43,112
Operating Segments | International Services
Segment Reporting Information [Line Items]
Revenues	9,542	8,383	20,021	14,509
Gross profit	2,024	1,875	3,873	3,087
Operating income (loss)	(205)	(1,682)	(945)	(2,008)
Depreciation	86	107	196	184
Intangibles amortization	0	0	0	0
Restructuring expense	0			1,207
Asset impairment loss	0	0	0	0
Capital expenditures	63	$ 258	85	$ 274
Assets	$ 12,077		$ 12,077			$ 15,431