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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance at Dec. 31, 2017	$ 42	$ (39)	$ 61,955	$ 25,929	$ 87,887
Beginning balance (in shares) at Dec. 31, 2017	4,173,675
Increase (Decrease) in Stockholders' Equity
Net income				8,210	8,210
Ending balance at Dec. 31, 2018	$ 42	(39)	61,955	34,139	96,097
Ending balance (in shares) at Dec. 31, 2018	4,173,675
Increase (Decrease) in Stockholders' Equity
Net income				4,145	4,145
Ending balance at Dec. 31, 2019	$ 42	(39)	61,955	38,284	$ 100,242
Ending balance (in shares) at Dec. 31, 2019	4,173,675				4,173,675
Increase (Decrease) in Stockholders' Equity
Net income				4,214	$ 4,214
Ending balance at Dec. 31, 2020	$ 42	$ (39)	$ 61,955	$ 42,498	$ 104,456
Ending balance (in shares) at Dec. 31, 2020	4,173,675				4,173,675

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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