CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2020	$ 68,042,972	$ 18,413	$ 166,424,597	$ (98,400,038)
Beginning Balance, Shares at Dec. 31, 2020		18,413,419
Stock-based compensation	309,610		309,610
Stock option and warrant exercises	253,389	$ 277	253,112
Stock option and warrant exercises, Shares		276,388
Net income (loss)	1,146,740			1,146,740
Ending Balance at Mar. 31, 2021	69,752,711	$ 18,690	166,987,319	(97,253,298)
Ending Balance, Shares at Mar. 31, 2021		18,689,807
Beginning Balance at Dec. 31, 2020	68,042,972	$ 18,413	166,424,597	(98,400,038)
Beginning Balance, Shares at Dec. 31, 2020		18,413,419
Net income (loss)	1,846,046
Ending Balance at Jun. 30, 2021	71,038,518	$ 18,740	167,573,770	(96,553,992)
Ending Balance, Shares at Jun. 30, 2021		18,739,653
Beginning Balance at Mar. 31, 2021	69,752,711	$ 18,690	166,987,319	(97,253,298)
Beginning Balance, Shares at Mar. 31, 2021		18,689,807
Stock-based compensation	506,391		506,391
Release of deferred stock units		$ 8	(8)
Release of deferred stock units, Shares		7,742
Stock option and warrant exercises	41,122	$ 19	41,103
Stock option and warrant exercises, Shares		19,167
Shares issued for Employee Stock Purchase Plan options	38,988	$ 23	38,965
Shares issued for Employee Stock Purchase Plan options, Shares		22,937
Net income (loss)	699,306			699,306
Ending Balance at Jun. 30, 2021	71,038,518	$ 18,740	167,573,770	(96,553,992)
Ending Balance, Shares at Jun. 30, 2021		18,739,653
Beginning Balance at Dec. 31, 2021	73,628,264	$ 19,046	170,318,199	(96,708,981)
Beginning Balance, Shares at Dec. 31, 2021		19,045,988
Stock-based compensation	258,638		258,638
Net income (loss)	(2,184,309)			(2,184,309)
Ending Balance at Mar. 31, 2022	71,702,593	$ 19,046	170,576,837	(98,893,290)
Ending Balance, Shares at Mar. 31, 2022		19,045,988
Beginning Balance at Dec. 31, 2021	$ 73,628,264	$ 19,046	170,318,199	(96,708,981)
Beginning Balance, Shares at Dec. 31, 2021		19,045,988
Stock option exercises, Shares	53,465
Net income (loss)	$ (1,034,078)
Ending Balance at Jun. 30, 2022	73,348,812	$ 19,117	171,072,754	(97,743,059)
Ending Balance, Shares at Jun. 30, 2022		19,117,173
Beginning Balance at Mar. 31, 2022	71,702,593	$ 19,046	170,576,837	(98,893,290)
Beginning Balance, Shares at Mar. 31, 2022		19,045,988
Stock-based compensation	326,894		326,894
Stock option exercises	92,428	$ 53	92,375
Stock option exercises, Shares		53,465
Shares issued for Employee Stock Purchase Plan options	76,666	$ 18	76,648
Shares issued for Employee Stock Purchase Plan options, Shares		17,720
Net income (loss)	1,150,231			1,150,231
Ending Balance at Jun. 30, 2022	$ 73,348,812	$ 19,117	$ 171,072,754	$ (97,743,059)
Ending Balance, Shares at Jun. 30, 2022		19,117,173