Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Total
Balance at Dec. 31, 2020	$ 433	$ 118,269	$ (78,080)	$ 40,622
Balance (in shares) at Dec. 31, 2020	43,347,887
Issuance of common stock for services	$ 1			1
Issuance of common stock for services (in shares)	8,530
Issuance of common stock upon exercise of stock options	$ 6	75		81
Issuance of common stock upon exercise of stock options (in shares)	603,331
Stock compensation expense		509		509
Excess tax benefits from exercise of stock options		(346)		(346)
Net income			26,071	26,071
Balance at Sep. 30, 2021	$ 440	118,507	(52,009)	66,938
Balance (in shares) at Sep. 30, 2021	43,959,748
Balance at Dec. 31, 2020	$ 433	118,269	(78,080)	40,622
Balance (in shares) at Dec. 31, 2020	43,347,887
Balance at Dec. 31, 2021	$ 448	116,312	(45,821)	70,939
Balance (in shares) at Dec. 31, 2021	44,758,925
Balance at Jun. 30, 2021	$ 437	118,639	(67,879)	51,197
Balance (in shares) at Jun. 30, 2021	43,707,392
Issuance of common stock for services	$ 1			1
Issuance of common stock for services (in shares)	8,530
Issuance of common stock upon exercise of stock options	$ 2	75		77
Issuance of common stock upon exercise of stock options (in shares)	243,826
Stock compensation expense		139		139
Excess tax benefits from exercise of stock options		(346)		(346)
Net income			15,870	15,870
Balance at Sep. 30, 2021	$ 440	118,507	(52,009)	66,938
Balance (in shares) at Sep. 30, 2021	43,959,748
Balance at Dec. 31, 2021	$ 448	116,312	(45,821)	70,939
Balance (in shares) at Dec. 31, 2021	44,758,925
Issuance of common stock upon exercise of stock options	$ 3	179		182
Issuance of common stock upon exercise of stock options (in shares)	311,443
Stock compensation expense		830		830
Excess tax benefits from exercise of stock options		(83)		(83)
Net income			98,721	98,721
Balance at Sep. 30, 2022	$ 451	117,238	52,900	170,589
Balance (in shares) at Sep. 30, 2022	45,070,368
Balance at Jun. 30, 2022	$ 450	116,943	23,544	140,937
Balance (in shares) at Jun. 30, 2022	45,020,087
Issuance of common stock upon exercise of stock options	$ 1	58		59
Issuance of common stock upon exercise of stock options (in shares)	50,281
Stock compensation expense		247		247
Excess tax benefits from exercise of stock options		(10)		(10)
Net income			29,356	29,356
Balance at Sep. 30, 2022	$ 451	$ 117,238	$ 52,900	$ 170,589
Balance (in shares) at Sep. 30, 2022	45,070,368