Consolidated Statements of Changes in Stockholders' Equity / (Deficiency) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018	80,763,350
Balance at Dec. 31, 2018	$ 8,076	$ 218,697,872	$ (115,791,261)	$ 0	$ 102,914,687
Net income (loss)			(7,241,147)		(7,241,147)
Issuance of common stock upon exercise of stock options (in shares)	9,769
Issuance of common stock upon exercise of stock options	$ 1	(1)			0
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights (in shares)	515,888
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights	$ 52				0
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights		(52)
Issuance of common stock to employees (in shares)	53,332
Issuance of common stock to employees	$ 5	(5)			0
Issuance of common stock upon exercise of warrants (in shares)	159,782
Issuance of common stock upon exercise of warrants	$ 16	1,172,785			1,172,801
Payment of common stock tendered for employee stock-based compensation tax obligations (in shares)	(232,253)
Payment of common stock tendered for employee stock-based compensation tax obligations	$ (23)	(1,176,556)			(1,176,579)
Stock-based compensation		2,113,994			2,113,994
Balance (in shares) at Dec. 31, 2019	81,269,868
Balance at Dec. 31, 2019	$ 8,127	220,808,037	(123,032,408)	0	97,783,756
Net income (loss)			56,342,010		56,342,010
Issuance of common stock upon exercise of stock options (in shares)	11,822
Issuance of common stock upon exercise of stock options	$ 1				0
Issuance of common stock upon exercise of warrants (in shares)	393,646
Issuance of common stock upon exercise of warrants	$ 40	3,003,477			3,003,517
Payment of common stock tendered for employee stock-based compensation tax obligations (in shares)	(29,035)
Payment of common stock tendered for employee stock-based compensation tax obligations	$ (3)	(184,013)			(184,016)
Stock-based compensation		1,350,948			1,350,948
Repurchase of common stock (in shares)	(4,628,473)
Repurchase of common stock	$ (463)		(28,502,483)		(28,502,946)
Issuance of common stock upon exercise of stock options		(1)
Issuance of common stock upon vesting of RSUs (in shares)	177,876
Issuance of common stock upon vesting of RSUs	$ 18	(18)			0
Balance (in shares) at Dec. 31, 2020	77,195,704
Balance at Dec. 31, 2020	$ 7,720	224,978,430	(95,192,881)	0	129,793,269
Net income (loss)			69,450,766		$ 69,450,766
Issuance of common stock upon exercise of stock options (in shares)					0
Payment of common stock tendered for employee stock-based compensation tax obligations (in shares)	(27,295)
Payment of common stock tendered for employee stock-based compensation tax obligations	$ (3)	(173,915)			$ (173,918)
Stock-based compensation		1,265,809			1,265,809
Repurchase of common stock (in shares)	(3,787,683)
Repurchase of common stock	$ (379)		(26,021,140)		(26,021,519)
Issuance of common stock upon vesting of RSUs (in shares)	162,876
Issuance of common stock upon vesting of RSUs	$ 16	(16)			0
Balance (in shares) at Dec. 31, 2021	73,543,602
Balance at Dec. 31, 2021	$ 7,354	$ 226,070,308	$ (51,763,255)	$ 0	$ 174,314,407