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CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Treasury stock	Additional paid-in-capital	Retained earnings	Total
Beginning Balance at Dec. 31, 2019	$ 25	$ (3,060)	$ 175,067	$ 50,357	$ 222,389
Beginning Balance (in shares) at Dec. 31, 2019	24,620,079
Share based compensation expense and stock units vested			97		97
Share based compensation expense and stock units vested (in shares)	17,143
Purchase of treasury stock		(682)			(682)
Net income				9,025	9,025
Ending Balance at Mar. 31, 2020	$ 25	(3,742)	175,164	59,382	230,829
Ending Balance (in shares) at Mar. 31, 2020	24,637,222
Beginning Balance at Dec. 31, 2020	$ 25	(4,477)	175,293	88,352	$ 259,193
Beginning Balance (in shares) at Dec. 31, 2020	24,639,125				24,639,125
Share based compensation expense and stock units vested			44		$ 44
Share based compensation expense and stock units vested (in shares)	8,571
Net income				9,024	9,024
Ending Balance at Mar. 31, 2021	$ 25	$ (4,477)	$ 175,337	$ 97,376	$ 268,261
Ending Balance (in shares) at Mar. 31, 2021	24,647,696				24,647,696

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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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