Income Taxes (Schedule of unrecognized tax positions) (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Unrecognized tax positions, beginning of period	$ 0
Unrecognized tax positions, end of period	0	$ 0
Domestic Tax Authority [Member]
Unrecognized tax positions, beginning of period	48,000	24,000
Gross increase - current period tax positions	239,000	27,000
Gross decrease - prior period tax positions	0	(2,000)
Gross increase - prior period tax positions	(676,000)	(1,000)
Expiration of statute of limitations	0	0
Unrecognized tax positions, end of period	$ 963,000	$ 48,000

Amount of unrecognized tax benefits.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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