Condensed Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Common Stock	Capital deficiency	Accumulated loss	Total
Beginning balance at Dec. 31, 2020	$ 11	$ (111,858)	$ (26,190)	$ (138,037)
Beginning balance (in shares) at Dec. 31, 2020	11,230,482
Stock-based compensation		98		98
Stock option exercises		34		34
Stock option exercises (in shares)	6,574
Components of comprehensive income:
Net income			8,642	8,642
Ending balance at Jun. 30, 2021	$ 11	(111,726)	(17,548)	(129,263)
Ending balance (in shares) at Jun. 30, 2021	11,237,056
Beginning balance at Mar. 31, 2021	$ 11	(111,807)	(23,780)	(135,576)
Beginning balance (in shares) at Mar. 31, 2021	11,230,482
Stock-based compensation		47		47
Stock option exercises		34		34
Stock option exercises (in shares)	6,574
Components of comprehensive income:
Net income			6,232	6,232
Ending balance at Jun. 30, 2021	$ 11	(111,726)	(17,548)	(129,263)
Ending balance (in shares) at Jun. 30, 2021	11,237,056
Beginning balance at Dec. 31, 2021	$ 11	(110,782)	(10,249)	$ (121,020)
Beginning balance (in shares) at Dec. 31, 2021	11,255,466			11,255,466
Stock-based compensation		1,962		$ 1,962
Stock option exercises		(60)		(60)
Stock option exercises (in shares)	7,222
Components of comprehensive income:
Net income			12,153	12,153
Ending balance at Jun. 30, 2022	$ 11	(108,880)	1,904	$ (106,965)
Ending balance (in shares) at Jun. 30, 2022	11,262,688			11,262,688
Beginning balance at Mar. 31, 2022	$ 11	(109,821)	(4,247)	$ (114,057)
Beginning balance (in shares) at Mar. 31, 2022	11,255,466
Stock-based compensation		1,001		1,001
Stock option exercises		(60)		(60)
Stock option exercises (in shares)	7,222
Components of comprehensive income:
Net income			6,151	6,151
Ending balance at Jun. 30, 2022	$ 11	$ (108,880)	$ 1,904	$ (106,965)
Ending balance (in shares) at Jun. 30, 2022	11,262,688			11,262,688