CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Apr. 01, 2017
Statement of Financial Position [Abstract]
Trade receivables, allowances	$ 474	$ 603
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	80,860	112,075
Finite-Lived Intangible Assets, Accumulated Amortization	$ 22,676	$ 21,994
Preferred stock, without par value	$ 0	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, without par value	$ 0	$ 0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, issued	34,067,000	33,260,000
Common stock, outstanding	34,067,000	33,260,000