Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details Textual)

v3.19.2
Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Jan. 02, 2019
Dec. 31, 2017
Organization and Summary of Significant Accounting Policies (Textual)              
Inventory reserves $ 330,000   $ 330,000   $ 330,000    
Operating lease right-of-use assets 2,490,784   2,490,784      
Operating lease liabilities 2,537,585   2,537,585        
Warranty reserve 175,000   175,000   175,000   $ 175,000
Accounting Standards Update 2016-02 [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Operating lease right-of-use assets           $ 2,847,495  
Operating lease liabilities           $ 2,847,495  
Australian Dollars [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Cash 35,437   35,437   152,254    
Romanian Leu [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Cash $ 21,801   $ 21,801   $ 9,368    
Vendor One [Member] | Accounts Payable [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk     40.00%   71.00%    
Vendor Two [Member] | Accounts Payable [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk     13.00%   3.00%    
Vendor Three [Member] | Accounts Payable [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk     9.00%   3.00%    
Accounts Receivable [Member] | Customer One [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk     41.00%   45.00%    
Accounts Receivable [Member] | Customer Two [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk     41.00%   42.00%    
Purchases [Member] | Yanmar [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk 42.00% 20.00% 40.00% 23.00%      
Purchases [Member] | Perkins Engines [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk 14.00% 2.00% 16.00% 2.00%      
Revenues [Member] | Customer One [Member] | Tier-1 telecommunications wireless carriers [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk 64.00% 76.00% 62.00% 71.00%      
Revenues [Member] | Customer One [Member] | Sales to Telecommunications Customers [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk 98.00% 91.00% 96.00% 92.00%      
Revenues [Member] | Customer Two [Member] | Tier-1 telecommunications wireless carriers [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Concentration risk 21.00% 11.00% 24.00% 18.00%      
Minimum [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Warranty term     1 year        
Maximum [Member]              
Organization and Summary of Significant Accounting Policies (Textual)              
Warranty term     5 years