Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Beginning balance at Dec. 31, 2019	$ 52	$ 6,242	$ (102)	$ 14,629	$ 20,821
Vesting of restricted stock					0
Net income (loss)				(38)	(38)
Ending balance at Mar. 31, 2020	52	6,242	(102)	14,591	20,783
Beginning balance at Dec. 31, 2020	52	6,405	(102)	17,294	23,649
Vesting of restricted stock		41			41
Net income (loss)				2,867	2,867
Ending balance at Mar. 31, 2021	$ 52	$ 6,446	$ (102)	$ 20,161	$ 26,557