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Note 10 - Long-term Debt (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
     
December 31,
   
December 31,
 
 
Maturity Date
 
2019
   
2018
 
Pacific Western Bank note
October 25, 2022
  $
15,878,121
    $
10,802,355
 
CSC build-to-suit equipment financing, net of discount
   
     
1,142,194
 
Less current portion
   
(5,585,637
)    
(316,906
)
Long-term debt, less current portion
  $
10,292,484
    $
11,627,643
 
Schedule of Maturities of Long-term Debt [Table Text Block]
Year ending December 31:
 
 
 
 
2020
  $
5,818,182
 
2021
   
5,818,182
 
2022
   
4,363,636
 
Thereafter
   
 
Total
   
16,000,000
 
Less: Unamortized discount
   
(91,520
)
Less: Unamortized debt issuance costs
   
(30,359
)
Less: Current portion of long-term debt
   
(5,585,637
)
Long-term debt, noncurrent
  $
10,292,484