Restructuring (narrative) (detail) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Plant Restructuring	$ (81,000)	$ 0
Midwest Plant [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Equipment Cost			$ 1,376,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Plant Restructuring	$ (81,000)
Employee Severance [Member] | Midwest Plant [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Equipment Cost			842,000
Other Restructuring [Member] | Midwest Plant [Member]
Restructuring Cost and Reserve [Line Items]
Plant Restructuring			270,000
Long Lived Asset Charges [Member] | Midwest Plant [Member]
Restructuring Cost and Reserve [Line Items]
Plant Restructuring			$ 264,000