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Debt Financing (Detail)
12 Months Ended
Jun. 30, 2014
Dec. 31, 2016
USD ($)
Jun. 24, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jun. 26, 2015
USD ($)
Jun. 26, 2015
CNY (¥)
Jun. 28, 2013
CNY (¥)
Short-term debt       $ 0      
Annual capital expenditure limit   $ 5,000,000          
Amount of letters of credit outstanding   3,292,000   7,803,000      
Remaining borrowing capacity   $ 1,708,000   7,197,000      
Commitment fee (as a percent)   0.25%          
Principal amount   $ 76,000   76,000      
Amended Amount              
Maximum borrowing capacity   15,000,000          
Amount Available for Increase Upon Approval of Lender              
Maximum borrowing capacity   25,000,000          
China Facility              
Maximum borrowing capacity         $ 5,392,000 ¥ 35,000,000 ¥ 35,000,000
Amount of letters of credit outstanding   22,000   57,000      
Remaining borrowing capacity   $ 914,000   $ 5,335,000      
People's Bank of China Base Rate | China Facility              
Basis spread (as a percent)   125.00%          
Maximum              
Basis spread (as a percent) 300.00%            
China Facility              
Interest rate at period end (as a percent)   6.80%   7.00%      
Revolving Credit Facility | China Facility              
Principal amount     $ 936,000        
Debt Instrument, Redemption, Period One | Revolving Credit Facility              
Debt Instrument, Covenant, Minimum EBITDA   $ 500,000          
Debt Instrument, Redemption, Period Two | Revolving Credit Facility              
Debt Instrument, Covenant, Minimum Working Capital   35,000,000          
Debt Instrument, Covenant, Minimum EBITDA   $ 1,000,000