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Note 19 - Subsequent Events (Details Textual)
2 Months Ended 4 Months Ended 9 Months Ended
Oct. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Mar. 15, 2016
USD ($)
Oct. 04, 2015
USD ($)
Sep. 28, 2014
USD ($)
Jan. 31, 2016
Oct. 31, 2015
USD ($)
Jul. 09, 2015
USD ($)
Jul. 02, 2015
USD ($)
Term Loan [Member] | Subsequent Event [Member] | Base Rate [Member]                  
Debt Instrument, Interest Rate, Stated Percentage 9.00%                
Term Loan [Member] | Subsequent Event [Member]                  
Debt Instrument, Face Amount $ 12,000,000                
Debt Prepayment, Alternative Satisfaction of Requirement, Amount of Cash to Be Deposited Into a Controlled Cash Collateral Account 5,000,000                
Debt Prepayment, Alternative Satisfaction of Requirement, Alternative Proceeds to Be Contributed $ 5,000,000                
Term Loan [Member] | Scenario, Forecast [Member]                  
Repayments of Debt   $ 5,000,000              
New Credit Facility [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member] | Base Rate [Member]                  
Debt Instrument, Interest Rate, Stated Percentage 2.50%                
New Credit Facility [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member] | Minimum [Member]                  
Basis Spread on Fedreal Funds Rate 0.50%                
New Credit Facility [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member] | Maximum [Member]                  
Basis Spread on Fedreal Funds Rate 3.25%                
New Credit Facility [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity $ 15,000,000                
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.50%                
Line of Credit Facility, Fixed Charge Coverage Ratio Trigger, Borrowing Availability $ 4,000,000                
Fixed Charge Coverage Ratio Applicable If Borrowing Availability Falls Below a Specified Level 1                
Subsequent Event [Member] | Revolving Credit Facility [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity               $ 10,000,000  
Subsequent Event [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity $ 8,500,000           $ 27,000,000    
Revolving Credit Facility [Member] | Minimum [Member]                  
Debt Instrument, Interest Rate, Stated Percentage       6.00%          
Revolving Credit Facility [Member] | Maximum [Member] | Scenario, Forecast [Member]                  
Debt Instrument, Interest Rate, Stated Percentage           10.00%      
Revolving Credit Facility [Member]                  
Line of Credit Facility, Maximum Borrowing Capacity       $ 25,000,000         $ 22,500,000
Scenario, Forecast [Member] | Land and Facility in Mexio [Member]                  
Proceeds from Sale of Property, Plant, and Equipment     $ 13,000,000            
Proceeds upon Signing from Sale of Property, Plant, and Equipment     $ 5,200,000            
Land and Facility in Mexio [Member]                  
Sale Leaseback Transaction, Net Book Value       3,316,000          
Proceeds from Sale of Property, Plant, and Equipment       $ 15,700,000 $ 8,000