Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 27, 2020	Mar. 29, 2020
Assets, Current [Abstract]
Cash and cash equivalents	$ 3,160	$ 4,277
Trade receivables — less allowance for doubtful accounts: $552 as of September 27, 2020 and $784 as of March 29, 2020	74,492	67,391
Inventories	63,194	54,436
Prepaid expenses and other current assets	1,735	4,927
Total current assets	142,581	131,031
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT, AND EQUIPMENT:	276,228	267,221
Less accumulated depreciation	148,754	140,877
Net property, plant, and equipment	127,474	126,344
Other Assets [Abstract]
Right-of-use assets	8,505	9,090
Goodwill	67,692	58,440
Intangible assets, net of accumulated amortization	71,247	60,653
Other	5,581	3,770
Total other assets	153,025	131,953
Total assets	423,080	389,328
Liabilities, Current [Abstract]
Accounts payable — trade	32,708	34,129
Accrued payroll and employee benefits	10,783	13,538
Income tax payable	851	59
Current portion of long-term debt	9,907	9,907
Short-term lease liability	1,458	1,523
Container deposits	1,412	1,376
Other current liabilities	1,639	1,688
Total current liabilities	58,758	62,220
LONG-TERM DEBT, LESS CURRENT PORTION	65,798	49,751
LONG-TERM LEASE LIABILITY	7,124	7,649
PENSION WITHDRAWAL LIABILITY	4,806	4,978
DEFERRED INCOME TAXES	25,116	25,106
OTHER LONG-TERM LIABILITIES	6,841	6,140
Total liabilities	168,443	155,844
COMMITMENTS AND CONTINGENCIES	0	0
SHAREHOLDERS’ EQUITY:
Common stock; authorized: 30,000,000 shares of $0.05 par value; 10,545,203 and 10,512,229 shares issued and outstanding as of September 27, 2020 and March 29, 2020, respectively	527	526
Additional paid-in capital	52,194	50,090
Retained earnings	201,966	182,947
Accumulated other comprehensive loss	(50)	(79)
Total shareholders’ equity	254,637	233,484
Total liabilities and shareholders’ equity	$ 423,080	$ 389,328