Cash (Narrative) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Cash [Abstract]
Federal Reserve Bank, reserve requirement	$ 1,400,000	$ 1,400,000
FDIC insured amount	$ 250,000

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashFDICInsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant