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Note 14 - Consolidated Balance Sheet Detail (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
December 31,
 
(In thousands)
 
2019
   
2018
 
Property and equipment
               
Leasehold improvements
  $
2,112
    $
1,284
 
Furniture and computer equipment
   
794
     
706
 
Manufacturing and other equipment
   
5,187
     
1,657
 
Subtotal
   
8,093
     
3,647
 
Less: Accumulated depreciation
   
(2,521
)
   
(2,328
)
Net property and equipment
  $
5,572
    $
1,319
 
Schedule of Accrued Liabilities [Table Text Block]
   
December 31,
 
(In thousands)
 
2019
   
2018
 
Accrued expenses and other current liabilities
  $
302
    $
62
 
Other payables
   
1,018
     
 
Accrued compensation
   
1,554
     
998
 
Deferred revenue
   
324
   
––
 
Deferred rent, current portion
 
––
     
130
 
Other
   
171
     
29
 
Total accrued expenses and other current liabilities
  $
3,369
    $
1,219