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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]  
Schedule of financial assets measured at fair value on nonrecurring basis
  As of March 31, 2020 
   Level 1   Level 2   Level 3   Total 
Assets:                
Cash and money market accounts  $6,505,141   $   $   $6,505,141 
Bank certificates of deposit       493,821        493,821 
Total  $6,505,141   $493,821   $   $6,998,962 

 

   As of December 31, 2019 
   Level 1   Level 2   Level 3   Total 
Assets:                
Cash and money market accounts  $6,293,293   $   $   $6,293,293 
Bank certificates of deposit       2,480,753        2,480,753 
Liabilities:                    
Interest rate swaps       (58,526)       (58,526)
Total, net  $6,293,293   $2,422,227   $   $8,715,520
Schedule of sales to significant customers
   During the Three-Month
Periods ended March 31,
 
   2020   2019 
Company A   38%   43%
Company B   31%   27%
Company C   11%   * 
Schedule of accounts receivable due from significant customers

   As of
March 31, 2020
   As of
December 31, 2019
 
Company B   41%   48%
Company A   33%   28%
Company C   12%   * 

 

*Amount is less than 10%.