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Debt Financing (Detail)
6 Months Ended
Jun. 26, 2015
CNY (¥)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jul. 31, 2017
USD ($)
Jun. 24, 2016
CNY (¥)
Jun. 24, 2016
USD ($)
May 31, 2016
USD ($)
May 09, 2016
USD ($)
Dec. 31, 2015
USD ($)
Basis spread on variable rate (as percent)   3.00%              
Annual capital expenditure limit   $ 5,000,000              
Domestic Line of Credit                  
Letters of credit, amount outstanding   $ 5,012,000             $ 7,803,000
Line of credit, commitment fee percentage   0.25%              
China Facility                  
Line of credit, maximum borrowing capacity ¥ 35,000,000       ¥ 6,500,000.0 $ 979,000      
Line of credit, amount outstanding   $ 0              
Interest paid   0 $ 30,000            
Standby Letters of Credit                  
Letters of credit, amount outstanding   103,000             57,000
Line of credit, remaining borrowing capacity   876,000             $ 5,335,000
Amended Amount                  
Line of credit, maximum borrowing capacity   15,000,000         $ 6,000,000 $ 7,000,000  
Amount Available for Increase Upon Approval of Lender                  
Line of credit, maximum borrowing capacity   25,000,000              
Base Rate | China Facility                  
Basis spread on variable rate (as percent) 125.00%                
Debt Instrument, Redemption, Period One | Revolving Credit Facility                  
Minimum EBITDA   500,000              
Debt Instrument, Redemption, Period Two | Revolving Credit Facility                  
Minimum EBITDA   1,000,000              
Minimum working capital   $ 35,000              
Scenario, Forecast | Subsequent Event | Amended Amount                  
Line of credit, maximum borrowing capacity       $ 5,000,000