Quarterly report pursuant to Section 13 or 15(d)

Long term debt - Schedule of Debt and Maturities (Details)

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Long term debt - Schedule of Debt and Maturities (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total long term debt $ 12,492,627 $ 12,636,763
Less: Current portion of Long Term Debt 3,021,908 2,680,116
Long Term Debt, net of Current Portion 9,470,719 9,956,647
Future minimum loan payments:    
2016 2,260,950  
2017 3,022,920  
2018 3,032,876  
2019 3,043,342  
2020 1,132,539  
Total long term debt 12,492,627 12,636,763
Medium-term Notes | Term Loan Agreements    
Debt Instrument [Line Items]    
Total long term debt 11,606,250 11,980,000
Future minimum loan payments:    
Total long term debt 11,606,250 11,980,000
Construction Loans | Equipment Financing Agreement    
Debt Instrument [Line Items]    
Total long term debt 886,377 656,763
Future minimum loan payments:    
Total long term debt $ 886,377 $ 656,763