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Liability Related to the Sale of Future Proceeds from Disposition of Subsidiary (Tables)
 6 Months Ended
Jun. 30, 2020
Proceeds as liability amount  
Schedule of activity within the liability account

Liabilities related to sale of future proceeds from disposition of subsidiaries - as of December 31, 2019  $603,000 
Non-Cash other income recognized   (211,000)
Non-Cash interest expense recognized   64,000 
Liabilities related to sale of future proceeds from disposition of subsidiary - as of June 30, 2020   456,000 
Less: unamortized transaction costs   (3,000)
Liability related to sale of future proceeds from disposition of subsidiary, net  $453,000