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Note 7 - Current Liabilities (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
  

2020

  

2019

 

Accounts payable - trade

 $16,221  $14,918 

Accrued payroll, benefits, and related liabilities

  11,633   12,193 

Deferred capacity and other revenue

  9,920   7,311 

Other

  6,155   4,686 

Total accounts payable, accrued and other current liabilities

 $43,929  $39,108 
Schedule of Advance Billing and Customer Deposits [Table Text Block]
  

2020

  

2019

 

Advance billings

 $3,608  $3,730 

Customer deposits

  31   31 

Total advance billings and customer deposits

 $3,639  $3,761