Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unbilled receivables	$ 148,000	$ 87,000
Provision for income taxes
Liability for uncertain tax positions	$ 0
Number of reportable segments \| segment	1
Number of operating segments \| segment	1
Advertising expense	$ 347,000	221,000	$ 194,000
Asset Impairment Charges	0	0	0
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Writeoff	0	0	$ 0
Restricted cash	$ 155,000	232,000
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, useful life	3 years
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, useful life	5 years
Letter of Credit [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 155,000	$ 232,000

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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