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Note 6 - Accrued Expenses and Other Current Liabilities
6 Months Ended
Jun. 30, 2020
Notes to Financial Statements  
Accrued Expenses and Other Liabilities [Text Block]

6. Accrued Expenses and Other Current Liabilities

 

Accrued expenses and other current liabilities consisted of the following:

 

  

As of

 
  

June 30, 2020

  

December 31, 2019

 

Compensation

 $1,747,880  $2,966,139 

Deferred revenue

  10,630,746   2,298,341 

Interest payable

     977,724 

Lease liability, current portion

  434,132   419,709 

Research and development vendor costs

  298,626   707,685 

Professional fees

  447,451   288,707 

Vacation

  438,599   256,402 

Other

  933,936   722,204 

Accrued expenses and other current liabilities

 $14,931,370  $8,636,911