Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Narrative)

v3.19.1
Summary of Significant Accounting Policies (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Cash $ 12,599,600 $ 9,946,654 $ 15,538,849 $ 185,151
Working capital 13,995,671      
Accumulated deficit 161,750,108   159,856,481  
Net income (loss) 1,893,627 (2,204,088)    
Cash balances in excess of FDIC insurance limits 12,249,662   $ 17,854,561  
Revenue recognition, contract liabilities 245,500      
Deferred revenue 83,279      
Revenues $ 577,390 $ 595,920    
Sales Revenue, Net [Member] | Significant Customer [Member]        
Concentration risk, percentage 12.00% 10.00%    
Accounts Receivable [Member] | Significant Customer [Member]        
Concentration risk, percentage 27.00%   35.00%  
Grant and Rebate [Member]        
Deferred revenue $ 99,351   $ 106,066  
Revenues $ 6,714 $ 16,231