Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($)	Public Stock Offering [Member] Common Stock [Member]	Public Stock Offering [Member] Additional Paid-in Capital [Member]	Public Stock Offering [Member] Treasury Stock [Member]	Public Stock Offering [Member] Deferred Compensation, Share-based Payments [Member]	Public Stock Offering [Member] Retained Earnings [Member]	Public Stock Offering [Member]	Private Placement [Member] Common Stock [Member]	Private Placement [Member] Additional Paid-in Capital [Member]	Private Placement [Member] Treasury Stock [Member]	Private Placement [Member] Deferred Compensation, Share-based Payments [Member]	Private Placement [Member] Retained Earnings [Member]	Private Placement [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Deferred Compensation, Share-based Payments [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2018													17,129,680
Balance at Dec. 31, 2018													$ 185,561	$ 74,568,627	$ (1,813,546)	$ (6,270,675)	$ (57,036,241)	$ 9,633,726
Issuance of common stock under equity incentive plan (in shares)													62,222
Issuance of common stock under equity incentive plan													$ 62	58,551				58,613
Warrant compensation costs														8,985				8,985
Deferred compensation amortization																224,795		224,795
Purchase of treasury stock															(21,822)			(21,822)
Net (loss) for the period																	(1,072,889)	(1,072,889)
Issuance of common stock (in shares)	769,230
Issuance of common stock	$ 769	$ 1,793,136				$ 1,793,905
Balance (in shares) at Mar. 31, 2019													17,961,132
Balance at Mar. 31, 2019													$ 186,392	76,429,299	(1,835,368)	(6,045,880)	(58,109,130)	10,625,313
Balance (in shares) at Dec. 31, 2018													17,129,680
Balance at Dec. 31, 2018													$ 185,561	74,568,627	(1,813,546)	(6,270,675)	(57,036,241)	9,633,726
Net (loss) for the period																		(3,587,534)
Balance (in shares) at Sep. 30, 2019													18,011,077
Balance at Sep. 30, 2019													$ 186,442	76,658,269	(1,866,130)	(5,585,571)	(60,623,775)	8,769,235
Balance (in shares) at Mar. 31, 2019													17,961,132
Balance at Mar. 31, 2019													$ 186,392	76,429,299	(1,835,368)	(6,045,880)	(58,109,130)	10,625,313
Issuance of common stock under equity incentive plan (in shares)													53,445
Issuance of common stock under equity incentive plan													$ 53	133,462				133,515
Warrant compensation costs														8,985				8,985
Deferred compensation amortization																222,585		222,585
Purchase of treasury stock															(28,693)			(28,693)
Net (loss) for the period																	(1,275,611)	(1,275,611)
Reversal of deferred compensation amortization that did not vest (in shares)													(6,000)
Reversal of deferred compensation amortization that did not vest													$ (6)	(13,254)		13,260
Balance (in shares) at Jun. 30, 2019													18,008,577
Balance at Jun. 30, 2019													$ 186,439	76,558,492	(1,864,061)	(5,810,035)	(59,384,741)	9,686,094
Issuance of common stock under equity incentive plan (in shares)													2,500
Issuance of common stock under equity incentive plan													$ 3	92,483				92,486
Warrant compensation costs														8,985				8,985
Deferred compensation amortization																224,464		224,464
Purchase of treasury stock															(2,069)			(2,069)
Net (loss) for the period																	(1,239,034)	(1,239,034)
Reversal of deferred compensation amortization that did not vest														(1,691)				(1,691)
Balance (in shares) at Sep. 30, 2019													18,011,077
Balance at Sep. 30, 2019													$ 186,442	76,658,269	(1,866,130)	(5,585,571)	(60,623,775)	8,769,235
Balance (in shares) at Dec. 31, 2019													18,224,577
Balance at Dec. 31, 2019													$ 186,656	77,055,273	(1,885,452)	(5,636,154)	(62,151,988)	7,568,335
Issuance of common stock under equity incentive plan (in shares)													51,000
Issuance of common stock under equity incentive plan													$ 51	59,440				59,491
Warrant compensation costs														8,985				8,985
Deferred compensation amortization																228,219		228,219
Purchase of treasury stock															(26,629)			(26,629)
Net (loss) for the period																	(835,009)	(835,009)
Balance (in shares) at Mar. 31, 2020													18,275,577
Balance at Mar. 31, 2020													$ 186,707	77,123,698	(1,912,081)	(5,407,935)	(62,986,997)	7,003,392
Balance (in shares) at Dec. 31, 2019													18,224,577
Balance at Dec. 31, 2019													$ 186,656	77,055,273	(1,885,452)	(5,636,154)	(62,151,988)	7,568,335
Net (loss) for the period																		(3,059,195)
Balance (in shares) at Sep. 30, 2020													25,887,785
Balance at Sep. 30, 2020													$ 194,318	88,392,782	(2,065,763)	(5,793,116)	(65,211,183)	15,517,038
Balance (in shares) at Mar. 31, 2020													18,275,577
Balance at Mar. 31, 2020													$ 186,707	77,123,698	(1,912,081)	(5,407,935)	(62,986,997)	7,003,392
Issuance of common stock under equity incentive plan (in shares)													1,500,544
Issuance of common stock under equity incentive plan													$ 1,500	1,641,304		(1,559,520)		83,284
Warrant compensation costs														8,988				8,988
Deferred compensation amortization																267,207		267,207
Purchase of treasury stock															(55,819)			(55,819)
Net (loss) for the period																	(1,288,169)	(1,288,169)
Balance (in shares) at Jun. 30, 2020													19,776,121
Balance at Jun. 30, 2020													$ 188,207	78,773,990	(1,967,900)	(6,700,248)	(64,275,166)	6,018,883
Issuance of common stock under equity incentive plan (in shares)													32,323
Issuance of common stock under equity incentive plan													$ 32	149,961				149,993
Warrant compensation costs														8,985				8,985
Deferred compensation amortization																312,232		312,232
Purchase of treasury stock															(97,863)			(97,863)
Net (loss) for the period																	(936,017)	(936,017)
Cashless warrant exercise (in shares)													27,051
Cashless warrant exercise													$ 27	(27)
Reversal of deferred compensation amortization that did not vest (in shares)													(450,000)
Reversal of deferred compensation amortization that did not vest													$ (450)	(791,550)		594,900		(197,100)
Issuance of common stock (in shares)	4,705,883						1,796,407
Issuance of common stock	$ 4,705	$ 7,253,220				$ 7,257,925	$ 1,797	$ 2,998,203				$ 3,000,000
Balance (in shares) at Sep. 30, 2020													25,887,785
Balance at Sep. 30, 2020													$ 194,318	$ 88,392,782	$ (2,065,763)	$ (5,793,116)	$ (65,211,183)	$ 15,517,038