Liability Related to the Sale of Future Proceeds from Disposition of Subsidiary (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Liability Related To Sale Of Future Proceeds From Disposition Of Subsidiary Details Abstract
Liabilities related to sale of future proceeds from disposition of subsidiaries - beginning balance
Cash received from sale of future proceeds from disposition of subsidiary	800,000
Non-Cash other income recognized	(282,000)
Non-Cash interest expense recognized	85,000
Liabilities related to sale of future proceeds from disposition of subsidiary - ending balance	603,000
Less: unamortized transaction costs	(3,000)
Liability related to sale of future proceeds from disposition of subsidiary, net	$ 600,000