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Note 6 - Accrued Expenses and Other Current Liabilities (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Accrued Expenses and Other Current Liabilities [Table Text Block]
   

As of

 
   

March 31, 2022

   

December 31, 2021

 

Research and development vendor costs

  $ 868,837     $ 256,397  

Deferred revenue

    793,464       3,764,696  

Other

    753,540       558,362  

Compensation

    716,680       2,811,700  

Lease liability, current portion

    486,752       466,830  

Professional fees

    457,206       527,026  

Vacation

    446,873       379,720  

Inventory

    130,068       488,081  

Accrued expenses and other current liabilities

  $ 4,653,420     $ 9,252,812