Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Beginning balance at Dec. 31, 2018	$ 51	$ 5,973	$ (102)	$ 12,925	$ 18,847
Vesting of restricted stock		84			84
Net income (loss)				340	340
Ending balance at Mar. 31, 2019	51	6,057	(102)	13,265	19,271
Beginning balance at Dec. 31, 2018	51	5,973	(102)	12,925	18,847
Vesting of restricted stock					223
Ending balance at Sep. 30, 2019	52	6,195	(102)	14,132	20,277
Beginning balance at Mar. 31, 2019	51	6,057	(102)	13,265	19,271
Vesting of restricted stock	1	69			70
Net income (loss)				288	288
Ending balance at Jun. 30, 2019	52	6,126	(102)	13,553	19,629
Vesting of restricted stock		69			69
Net income (loss)				579	579
Ending balance at Sep. 30, 2019	52	6,195	(102)	14,132	20,277
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, 2019	52	6,242	(102)	14,629	20,821
Vesting of restricted stock					0
Ending balance at Sep. 30, 2020	52	6,242	(102)	16,581	22,773
Beginning balance at Mar. 31, 2020	52	6,242	(102)	14,591	20,783
Vesting of restricted stock					0
Net income (loss)				441	441
Ending balance at Jun. 30, 2020	52	6,242	(102)	15,032	21,224
Vesting of restricted stock					0
Net income (loss)				1,549	1,549
Ending balance at Sep. 30, 2020	$ 52	$ 6,242	$ (102)	$ 16,581	$ 22,773