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Commitments and Contingencies (Details Textual)	9 Months Ended
	Oct. 02, 2015 USD ($)	Oct. 02, 2015 JPY (¥)	May. 01, 2015 CHF (SFr)	May. 01, 2015 EUR (€)	Jan. 02, 2015 USD ($)	Jan. 02, 2015 JPY (¥)	Dec. 28, 2012 JPY (¥)	Aug. 31, 2010 CHF (SFr)
Loss Contingencies [Line Items]
Line Of Credit, Current	$ 4,168,000				$ 4,150,000
Line of Credit Facility, Expiration Date	Sep. 30, 2016
Bankinter [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 436,000			€ 400,000
Line of Credit Facility, Current Borrowing Capacity	$ 578,000		SFr 564,000
Debt Instrument, Maturity Date	May 01, 2017
CDPH [Member] | Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Restricted Cash and Cash Equivalents, Noncurrent	$ 120,000				120,000
Mizuho Bank [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	4,200,000						¥ 500,000,000
Line Of Credit, Current	$ 4,200,000	¥ 500,000,000			$ 4,200,000	¥ 500,000,000
Mizuho Bank [Member] | Prime Rate [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Interest Rate at Period End	1.475%	1.475%
Credit Suisse [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity | SFr								SFr 1,000,000
Line Of Credit, Current	$ 1,000,000

X

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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