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Other accrued liabilities (Tables)
12 Months Ended
Dec. 31, 2019
Payables and Accruals [Abstract]  
Schedule of accrued liabilities
   2019   2018 
Accrued interest  $549   $288 
Delaware Franchise tax   211    194 
Other   54    42 
Total  $814   $524 
Schedule of other long term accrued liabilities
   2019   2018 
Management fees  $623   $606 
Accrued interest   -    18 
Commissions and deferred compensation   46    41 
Total  $669   $665