Investments (Details 2)	6 Months Ended
	Jun. 30, 2020 USD ($)
Beginning balance, December 31, 2019	$ 0
Allowance recognized upon adoption of Topic 326	42,000
Provision for credit loss expense	40,000
Ending balance, June 30, 2020	82,000
Short-term Investments [Member]
Beginning balance, December 31, 2019	0
Allowance recognized upon adoption of Topic 326	9,000
Provision for credit loss expense	7,000
Ending balance, June 30, 2020	16,000
Long Term Investments [Member]
Beginning balance, December 31, 2019	0
Allowance recognized upon adoption of Topic 326	33,000
Provision for credit loss expense	33,000
Ending balance, June 30, 2020	$ 66,000