Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands		3 Months Ended
Dec. 22, 2017	Jun. 30, 2018	Jul. 01, 2017
U.S. statutory tax rate (in percent)	21.00%	17.40%	25.80%
Previously U.S. statutory tax rate (in percent)	35.00%
Percentage of total net sales		6.00%
Single Performance [Member]
Percentage of total net sales		93.00%
Accounting Standards Update 2017-07 [Member]
Reclassification net periodic benefit cost			$ 200
Maximum [Member]
Percentage of total net sales		1.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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