Credit Facility (Narrative) (Details) - USD ($)	2 Months Ended	12 Months Ended
	Mar. 09, 2017	Dec. 30, 2016	Jul. 01, 2016	May 09, 2016
Line of Credit Facility [Line Items]
Pledge of capital stock to U.S. subsidiaries		100.00%
Pledge of capital stock to direct foreign subsidiaries		66.00%
Revolver [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility		$ 20,000,000		$ 45,000,000
Additional borrowing capacity				$ 25,000,000
Outstanding balance		7,000,000	$ 25,000,000
Payment of principal		18,000,000
Debt issuance costs		$ 400,000
Maturity date		May 09, 2021
Term Loan [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility		$ 47,000,000
Credit Facility [Member]
Line of Credit Facility [Line Items]
Interest rate		2.18%
Debt issuance costs		$ 200,000
Credit Facility [Member] | Base Rate [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate		0.75%
Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate		1.50%
Subsequent Event [Member] | Revolver [Member]
Line of Credit Facility [Line Items]
Additional amount drawn on loan	$ 8,000,000