Borrowings (Details Textual) € in Millions	12 Months Ended
	Dec. 26, 2015 USD ($)	Dec. 27, 2014 EUR (€)	Dec. 28, 2013 USD ($)	Aug. 27, 2013 EUR (€)
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	$ 250,000
Bank Overdrafts | €				€ 1.0
Long-term Line of Credit, Noncurrent	$ 5,000,000
Short-term Debt, Weighted Average Interest Rate	1.91%	1.57%
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 1,600,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	$ 800,000
Line of Credit Facility, Interest Rate at Period End	1.862%
Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Increase (Decrease) in Book Overdrafts | €		€ 1.0
Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Aug. 27, 2018
Debt Instrument, Face Amount	$ 5,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.00%
Mortgage Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Sep. 30, 2028
Debt Instrument, Interest Rate, Stated Percentage		0.31%
Mortgage Payable [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		10.00%
Seller Financed Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Nov. 30, 2016
Debt Instrument, Periodic Payment	$ 156,000
Long-term Debt, Gross	$ 600,000
Senior Revolving Credit Facility [Member] | Restated Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Increase (Decrease), Net, Total			$ 9,000,000
Line of Credit Facility, Maximum Borrowing Capacity			$ 31,000,000
Debt Instrument, Maturity Date			Aug. 27, 2016