Investment in Equity Investee (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity interest in CONTADO acquisition				19.99%
Equity interest in CONTADO, excess cost of investment over underlying equity in net assets				$ 9,000,000
Earnings of equity method investment	$ 1,713,000	$ 1,136,000	$ 936,000
Dividends received from CONTADO	1,200,000	0	500,000
Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Equity interest in CONTADO, amortization expense	$ 200,000	$ 200,000	$ 300,000