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Commitments and Contingencies (Details Textual)
1 Months Ended 6 Months Ended
Mar. 08, 2018
USD ($)
Jan. 31, 2017
USD ($)
Jun. 29, 2018
USD ($)
Jun. 29, 2018
CHF (SFr)
Jun. 29, 2018
JPY (¥)
Dec. 29, 2017
USD ($)
Dec. 29, 2017
JPY (¥)
Line of Credit, Current     $ 4,517,000     $ 4,438,000  
Capital Lease Obligations, Current     1,599,000     1,278,000  
lease schedule 009R [Member]              
Capital Leases Transaction Net Proceeds Expiration Term   24 months          
Capital Lease Obligations, Current     576,000     1,067,000  
Capital Lease Obligations   $ 1,957,000          
Lease Schedule 010R [Member]              
Capital Leases Transaction Net Proceeds Expiration Term 24 months            
Capital Lease Obligations $ 1,560,000   1,221,000        
Lease Schedule 011 [Member]              
Capital Lease Obligations $ 500,000   $ 468,000        
Hardware Equipment [Member] | lease schedule 009R [Member]              
Capital Leases Transaction Imputed Interest Rate Term   3.94% per $1          
Hardware Equipment [Member] | Lease Schedule 010R [Member]              
Capital Leases Transaction Imputed Interest Rate Term 3.94% per $1            
Hardware Equipment [Member] | Lease Schedule 011 [Member]              
Capital Leases Transaction Imputed Interest Rate Term 3.94% per $1            
Non-Hardware Equipment [Member] | lease schedule 009R [Member]              
Capital Leases Transaction Imputed Interest Rate Term   4.75% per $1          
Non-Hardware Equipment [Member] | Lease Schedule 010R [Member]              
Capital Leases Transaction Imputed Interest Rate Term 4.75% per $1            
Non-Hardware Equipment [Member] | Lease Schedule 011 [Member]              
Capital Leases Transaction Imputed Interest Rate Term 4.75% per $1            
Mizuho Bank [Member]              
Line of Credit Facility, Maximum Borrowing Capacity | ¥         ¥ 500,000,000   ¥ 500,000,000
Line of Credit Facility, Interest Rate Description     (approximately 0.06% as of June 29, 2018) plus a 0.50% spread, and may be renewed quarterly (the current line expires on August 21, 2018).        
Line of Credit, Current     $ 4,517,000   ¥ 500,000,000 4,438,000  
Interest Rate Increase In Case Of Default     14.00%        
Credit Suisse Bank [Member]              
Line of Credit Facility, Maximum Borrowing Capacity     $ 1,000,000 SFr 1,000,000   $ 1,000,000  
Percentage Of Commission On Outstanding Notes Payable     0.25%