CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-In Capital	Accumulated OCI	Accumulated Deficit	Total
Balance (in shares) at Dec. 31, 2018	8,411,245
Balance at Dec. 31, 2018	$ 84,113	$ 94,926,560	$ (186,485)	$ (70,407,218)	$ 24,939,418
Stock compensation expense - restricted		16,737			16,737
Stock compensation expense - non-qualified stock options		72,529			72,529
Foreign currency translation gain (loss)			(29,282)		(29,282)
Net income (loss)				384,101	384,101
Balance (in shares) at Mar. 31, 2019	8,411,245
Balance at Mar. 31, 2019	$ 84,113	95,015,826	(215,767)	(70,023,117)	24,861,055
Balance (in shares) at Dec. 31, 2018	8,411,245
Balance at Dec. 31, 2018	$ 84,113	94,926,560	(186,485)	(70,407,218)	24,939,418
Foreign currency translation gain (loss)					(65,698)
Net income (loss)					260,050
Balance (in shares) at Sep. 30, 2019	8,477,519
Balance at Sep. 30, 2019	$ 84,776	95,462,725	(252,183)	(70,147,168)	25,148,150
Balance (in shares) at Mar. 31, 2019	8,411,245
Balance at Mar. 31, 2019	$ 84,113	95,015,826	(215,767)	(70,023,117)	24,861,055
Issuance of common stock - restricted (in shares)	66,274
Issuance of common stock - restricted	$ 663	(663)			0
Stock compensation expense - restricted		180,863			180,863
Stock compensation expense - non-qualified stock options		103,248			103,248
Foreign currency translation gain (loss)			13,995		13,995
Net income (loss)				(307,761)	(307,761)
Balance (in shares) at Jun. 30, 2019	8,477,519
Balance at Jun. 30, 2019	$ 84,776	95,299,274	(201,772)	(70,330,878)	24,851,400
Stock compensation expense - restricted		91,826			91,826
Stock compensation expense - non-qualified stock options		71,625			71,625
Foreign currency translation gain (loss)			(50,411)		(50,411)
Net income (loss)				183,710	183,710
Balance (in shares) at Sep. 30, 2019	8,477,519
Balance at Sep. 30, 2019	$ 84,776	95,462,725	(252,183)	(70,147,168)	25,148,150
Balance (in shares) at Dec. 31, 2019	8,386,145
Balance at Dec. 31, 2019	$ 83,861	95,279,114	(242,594)	(70,180,963)	24,939,418
Common stock repurchased (in shares)	(2,416)
Common stock repurchased	$ (24)	(10,089)			(10,113)
Stock compensation expense - restricted		254,499			254,499
Stock compensation expense - non-qualified stock options		26,942			26,942
Foreign currency translation gain (loss)			(37,330)		(37,330)
Net income (loss)				483,888	483,888
Balance (in shares) at Mar. 31, 2020	8,383,729
Balance at Mar. 31, 2020	$ 83,837	95,550,466	(279,924)	(69,697,075)	25,657,304
Balance (in shares) at Dec. 31, 2019	8,386,145
Balance at Dec. 31, 2019	$ 83,861	95,279,114	(242,594)	(70,180,963)	24,939,418
Foreign currency translation gain (loss)					55,159
Net income (loss)					2,039,478
Balance (in shares) at Sep. 30, 2020	8,458,734
Balance at Sep. 30, 2020	$ 84,587	95,919,199	(187,435)	(68,141,485)	27,674,866
Balance (in shares) at Mar. 31, 2020	8,383,729
Balance at Mar. 31, 2020	$ 83,837	95,550,466	(279,924)	(69,697,075)	25,657,304
Issuance of common stock - restricted (in shares)	58,123
Issuance of common stock - restricted	$ 581	(581)			0
Stock compensation expense - restricted		182,928			182,928
Stock compensation expense - non-qualified stock options		26,499			26,499
Foreign currency translation gain (loss)			27,599		27,599
Net income (loss)				488,627	488,627
Balance (in shares) at Jun. 30, 2020	8,441,852
Balance at Jun. 30, 2020	$ 84,418	95,759,312	(252,325)	(69,208,448)	26,382,957
Issuance of common stock - options exercises, shares	16,882
Issuance of common stock - options exercises, amount	$ 169	(169)
Stock compensation expense - restricted		133,266			133,266
Stock compensation expense - non-qualified stock options		26,790			26,790
Foreign currency translation gain (loss)			64,890		64,890
Net income (loss)				1,066,963	1,066,963
Balance (in shares) at Sep. 30, 2020	8,458,734
Balance at Sep. 30, 2020	$ 84,587	$ 95,919,199	$ (187,435)	$ (68,141,485)	$ 27,674,866