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Stockholders' Equity (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Nov. 30, 2019	Nov. 30, 2018	May 05, 2017
Maximum
Class of Stock [Line Items]
Requirement to own shares outstanding as percent							4.99%
Common Stock
Class of Stock [Line Items]
Remaining authorized amount	$ 7,000,000		$ 7,000,000		$ 2,900,000
Authorized incremental amount					$ 7,100,000
Stock repurchased (in shares)	0	0	0	20,613
Stock repurchased		$ 0		$ 200,000
Common Stock | Maximum
Class of Stock [Line Items]
Authorized amount						$ 20,000,000

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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