CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]
Beginning Balance at Dec. 31, 2018	$ 50,783,809	$ 102,739	$ 211,265,279	$ (160,563,961)	$ (20,248)
Beginning Balance (shares) at Dec. 31, 2018		102,739,257
Issuance of stock options for services	933,411		933,411
Exercise of stock options for common stock	89,350	$ 65	89,285
Exercise of stock options for common stock (shares)		65,000
Other comprehensive gain (loss)	13,560				13,560
Net income (loss)	(644,503)			(644,503)
Ending Balance at Mar. 31, 2019	51,175,627	$ 102,804	212,287,975	(161,208,464)	(6,688)
Ending Balance (shares) at Mar. 31, 2019		102,804,257
Beginning Balance at Dec. 31, 2018	50,783,809	$ 102,739	211,265,279	(160,563,961)	(20,248)
Beginning Balance (shares) at Dec. 31, 2018		102,739,257
Net income (loss)	23,945,624
Ending Balance at Sep. 30, 2019	77,982,538	$ 103,041	214,478,406	(136,618,337)	19,428
Ending Balance (shares) at Sep. 30, 2019		103,041,033
Beginning Balance at Mar. 31, 2019	51,175,627	$ 102,804	212,287,975	(161,208,464)	(6,688)
Beginning Balance (shares) at Mar. 31, 2019		102,804,257
Issuance of stock options for services	924,996		924,996
Exercise of stock options for common stock	192,550	$ 125	192,425
Exercise of stock options for common stock (shares)		125,000
Other comprehensive gain (loss)	28,446				28,446
Net income (loss)	10,959,948			10,959,948
Ending Balance at Jun. 30, 2019	63,281,567	$ 102,929	213,405,396	(150,248,516)	21,758
Ending Balance (shares) at Jun. 30, 2019		102,929,257
Issuance of stock options for services	817,060		817,060
Exercise of stock options for common stock	256,062	$ 112	255,950
Exercise of stock options for common stock (shares)		111,776
Other comprehensive gain (loss)	(2,330)				(2,330)
Net income (loss)	13,630,179			13,630,179
Ending Balance at Sep. 30, 2019	77,982,538	$ 103,041	214,478,406	(136,618,337)	19,428
Ending Balance (shares) at Sep. 30, 2019		103,041,033
Beginning Balance at Dec. 31, 2019	87,629,956	$ 103,397	216,205,678	(128,688,624)	9,505
Beginning Balance (shares) at Dec. 31, 2019		103,397,033
Issuance of stock options for services	1,383,672		1,383,672
Exercise of stock options for common stock	26,149	$ 12	26,137
Exercise of stock options for common stock (shares)		11,666
Amortization of restricted stock for services	135,679		135,679
Other comprehensive gain (loss)	74,246				74,246
Net income (loss)	10,426,015			10,426,015
Ending Balance at Mar. 31, 2020	99,675,717	$ 103,409	217,751,166	(118,262,609)	83,751
Ending Balance (shares) at Mar. 31, 2020		103,408,699
Beginning Balance at Dec. 31, 2019	87,629,956	$ 103,397	216,205,678	(128,688,624)	9,505
Beginning Balance (shares) at Dec. 31, 2019		103,397,033
Net income (loss)	63,545,869
Ending Balance at Sep. 30, 2020	156,627,872	$ 103,648	221,673,450	(65,142,755)	(6,471)
Ending Balance (shares) at Sep. 30, 2020		103,648,224
Beginning Balance at Mar. 31, 2020	99,675,717	$ 103,409	217,751,166	(118,262,609)	83,751
Beginning Balance (shares) at Mar. 31, 2020		103,408,699
Issuance of stock options for services	1,627,105		1,627,105
Exercise of stock options for common stock	36,201	$ 13	36,188
Exercise of stock options for common stock (shares)		13,333
Amortization of restricted stock for services	167,357		167,357
Other comprehensive gain (loss)	(84,942)				(84,942)
Net income (loss)	9,779,987			9,779,987
Ending Balance at Jun. 30, 2020	111,201,425	$ 103,422	219,581,816	(108,482,622)	(1,191)
Ending Balance (shares) at Jun. 30, 2020		103,422,032
Issuance of stock options for services	1,345,962		1,345,962
Exercise of stock options for common stock	631,048	$ 215	630,833
Exercise of stock options for common stock (shares)		215,097
Amortization of restricted stock for services	131,884		131,884
Issuance of common stock upon vesting of restricted stock units, net	(17,034)	$ 11	(17,045)
Issuance of common stock upon vesting of restricted stock units, net (Share)		11,095
Other comprehensive gain (loss)	(5,280)				(5,280)
Net income (loss)	43,339,867			43,339,867
Ending Balance at Sep. 30, 2020	$ 156,627,872	$ 103,648	$ 221,673,450	$ (65,142,755)	$ (6,471)
Ending Balance (shares) at Sep. 30, 2020		103,648,224