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Debt and Leases (Details) (USD $)
 3 Months Ended 3 Months Ended
Apr. 30, 2014
Jan. 31, 2014
Mar. 07, 2014
Oct. 31, 2013
Jun. 25, 2013
Jun. 25, 2013
Convertible Debt [Member]
Jan. 31, 2014
Connecticut Development Authority Note [Member]
Oct. 31, 2013
Connecticut Development Authority Note [Member]
Mar. 05, 2013
Connecticut Clean Energy Fund [Member]
Jan. 31, 2014
Connecticut Clean Energy and Finance Investment Authority [Member]
Oct. 31, 2013
Connecticut Clean Energy and Finance Investment Authority [Member]
Mar. 05, 2013
Connecticut Clean Energy and Finance Investment Authority [Member]
Jan. 31, 2014
Convertible debt make-whole obligation [Member]
Debt Instrument [Line Items]                          
Line of Credit Facility, Amount Outstanding   $ 6,500,000   $ 6,500,000     $ 3,190,000 $ 3,246,000   $ 6,061,000 $ 5,744,000    
Senior Unsecured Convertible Notes   23,000,000 1,000,000 38,000,000 38,000,000                
Capital Lease Obligations   451,000   497,000                  
Long-term Debt, Gross   39,202,000   53,987,000                  
Debt Instrument, Unamortized Discount   (1,767,000) [1]   (3,106,000) [1]                  
Long-term Debt   37,435,000   50,881,000                  
Long-term Debt, Current Maturities   (6,914,000)   (6,931,000)                  
Long-term Debt, Excluding Current Maturities   30,521,000   43,950,000                  
Line of Credit Facility, Maximum Borrowing Capacity   8,000,000             5,900,000        
Debt Instrument, Interest Rate, Stated Percentage           8.00%           5.00%  
Debt Instrument, Convertible, Conversion Ratio   645.1613                      
Debt Conversion, Converted Instrument, Amount   1,000                      
Debt Instrument, Convertible, Conversion Price   $ 1.55     $ 1.55                
embedded derivative cash payment   300,000                      
Embedded Derivative, Fair Value of Embedded Derivative Liability   2,700,000   4,700,000                  
Stock Issued During Period, Shares, Conversion of Convertible Securities 17,500,000 9,677,425                      
Stock Issued During Period, Shares, Other                         2,344,080
Stock Issued During Period, Value, Other   4,240,000                      
Embedded Derivative, Loss on Embedded Derivative   2,400,000                      
Embedded Derivative, No Longer Bifurcated, Amount Reclassified to Stockholders' Equity   1,800,000                      
Debt Conversion, Original Debt, Amount $ 22,000,000 $ 15,000,000                      
[1] The debt discount recorded in connection with the issuance of the Company’s unsecured convertible notes is recorded on the consolidated balance sheets as a reduction to associated debt balance. The Company amortizes the debt discount to interest expense over the term of the debt.