Business Segments and Significant Customers - Reportable Segments Information (Details)	3 Months Ended												12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 24, 2016 USD ($)	Jun. 25, 2016 USD ($)	Mar. 26, 2016 USD ($)	Dec. 26, 2015 USD ($)	Sep. 26, 2015 USD ($)	Jun. 27, 2015 USD ($)	Mar. 28, 2015 USD ($)	Dec. 27, 2014 USD ($)	Sep. 27, 2014 USD ($)	Jun. 28, 2014 USD ($)	Mar. 29, 2014 USD ($)	Dec. 31, 2016 USD ($) item	Dec. 26, 2015 USD ($)	Dec. 27, 2014 USD ($)
Business segments revenue by products
Number of reportable segments | item													2
Net revenues from external customers	$ 63,365,000	$ 66,529,000	$ 69,263,000	$ 69,855,000	$ 68,664,000	$ 69,865,000	$ 66,422,000	$ 77,607,000	$ 73,746,000.000	$ 72,556,000.000	$ 71,852,000.000	$ 67,509,000.000	$ 269,012,000	$ 282,558,000	$ 285,663,000
Depreciation and amortization included in segment gross profit													4,126,000	4,746,000	4,636,000
Segment gross profit	5,751,000	7,924,000	10,267,000	8,817,000	7,312,000	8,700,000	8,025,000	(3,700,000)	15,176,000.000	12,926,000.000	13,456,000.000	11,563,000.000	32,759,000	20,337,000	53,121,000
Goodwill	14,985,000				23,286,000				23,286,000				14,985,000	23,286,000	23,286,000
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit	5,751,000	$ 7,924,000	$ 10,267,000	$ 8,817,000	7,312,000	$ 8,700,000	$ 8,025,000	$ (3,700,000)	15,176,000.000	$ 12,926,000.000	$ 13,456,000.000	$ 11,563,000.000	32,759,000	20,337,000	53,121,000
Operating expenses													34,994,000	37,559,000	34,188,000
Impairment of goodwill and intangible assets													15,446,000	9,277,000
Interest expense, net													(9,874,000)	(6,330,000)	(2,604,000)
Income (loss) before income tax expense													(27,555,000)	(32,829,000)	16,329,000
Frozen Products
Business segments revenue by products
Net revenues from external customers													160,550,000	167,166,000	179,518,000
Depreciation and amortization included in segment gross profit													1,933,000	2,336,000	2,103,000
Segment gross profit													15,067,000	2,729,000	32,329,000
Goodwill	8,999,000				17,300,000				17,300,000				8,999,000	17,300,000	17,300,000
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit													15,067,000	2,729,000	32,329,000
Snack Products
Business segments revenue by products
Net revenues from external customers													108,462,000	115,392,000	106,145,000
Depreciation and amortization included in segment gross profit													2,193,000	2,410,000	2,533,000
Segment gross profit													17,692,000	17,608,000	20,792,000
Goodwill	$ 5,986,000				$ 5,986,000				$ 5,986,000				5,986,000	5,986,000	5,986,000
Reconciliation of reportable segment gross profit to consolidated income before income tax provision
Segment gross profit													17,692,000	17,608,000	20,792,000
Berries Beverage Blends and Desserts Product | Frozen Products
Business segments revenue by products
Net revenues from external customers													112,099,000	121,632,000	118,473,000
Vegetables Product | Frozen Products
Business segments revenue by products
Net revenues from external customers													48,451,000	45,534,000	61,045,000
Indulgent Specialty Snacks Product | Snack Products
Business segments revenue by products
Net revenues from external customers													38,187,000	44,482,000	49,091,000
Healthy And Natural Food Product
Business segments revenue by products
Net revenues from external customers													230,800,000	238,100,000	236,600,000
Healthy Natural Snacks Product | Snack Products
Business segments revenue by products
Net revenues from external customers													$ 70,275,000	$ 70,910,000	$ 57,054,000