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Liability Related to the Sale of Future Proceeds from Disposition of Subsidiary (Tables)
 3 Months Ended
Mar. 31, 2020
Liability Related To Sale Of Future Proceeds From Disposition Of Subsidiary  
Schedule of activity within the liability account

Liabilities related to sale of future proceeds from disposition of subsidiaries - as of December 31, 2019  $602,000 
Non-Cash other income recognized   (92,000)
Non-Cash interest expense recognized   28,000 
Liabilities related to sale of future proceeds from disposition of subsidiary - as of March 31, 2020   538,000 
Less: unamortized transaction costs   (3,000)
Liability related to sale of future proceeds from disposition of subsidiary, net  $535,000