Liability Related to the Sale of Future Proceeds from Disposition of Subsidiary (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
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	$ (89,000)	(198,000)
Non-Cash interest expense recognized	27,000	60,000
Liabilities related to sale of future proceeds from disposition of subsidiary - ending balance	$ 662,000	662,000
Less: unamortized transaction costs		(3,000)
Liability related to sale of future proceeds from disposition of subsidiary, net		$ 659,000