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Long-Term Debt and Credit Facilities (Details Narrative)
Apr. 26, 2018
USD ($)
Apr. 26, 2018
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]        
Total liquidity     $ 14,800,000  
Cash and cash equivalents     11,570,566 $ 3,686,302
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity $ 5,000,000 $ 5,000,000 5,000,000  
Line of credit extended date, description   On April 26, 2018, the Company entered into a First Amendment to Third Amended and Restated Loan and Security Agreement with Silicon Valley Bank to extend the maturity of the revolving line of credit to April 25, 2019.    
Liquidity ratio 1.75 1.75    
Minimum unrestricted cash balance     1,500,000  
Line of credit facility, current borrowing capacity     $ 3,200,000  
Revolving Credit Facility [Member] | Prime Rate [Member] | Streamline Period [Member]        
Debt Instrument [Line Items]        
Line of credit interest rate   4.50%    
Revolving Credit Facility [Member] | Prime Rate [Member] | Non-Streamline Period [Member]        
Debt Instrument [Line Items]        
Line of credit interest rate 4.50% 1.50%