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Earnings per Share - Computation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net (Loss) Income, Basic	$ (2,316)	$ 3,476
Net (Loss) Income, Diluted	$ (2,316)	$ 3,476
Weighted Average Number of Shares Outstanding, Basic	1,994,425	2,019,502
Weighted Average Number of Shares Outstanding, Options		761,233
Weighted Average Number of Shares Outstanding, Diluted	1,994,425	2,780,735
Per Share Amount, Basic	$ (1.16)	$ 1.72
Per Share Amount, Diluted	$ (1.16)	$ 1.25

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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