Employee Benefits Plans (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Employee Benefits Plans (Textual)
Contributions to security fund amount	$ 137,000	$ 172,000

Amount of cost (reversal of cost) for pension and other postretirement benefits.

No definition available.

Name:	us-gaap_PensionAndOtherPostretirementBenefitExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration