STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Income	Accumulated Deficit	Treasury Stock	Total
Beginning balance, shares at Dec. 31, 2017	3,724,547	1,648,657				(14,535)
Beginning balance, amount at Dec. 31, 2017	$ 3,725	$ 1,649	$ 68,574,974	$ 975,877	$ (55,845,766)	$ (26,529)	$ 13,683,930
Repurchase of common and preferred shares, shares	(33,899)					(4,905)
Repurchase of common and preferred shares, amount	$ (34)		(107,184)		63,244	$ (7,986)	(51,960)
Foreign currency translation adjustment				(372,157)			(372,157)
Share-based compensation expense			356,354				356,354
Net income (loss)					(509,370)		(509,370)
Ending balance, shares at Mar. 31, 2018	3,690,648	1,648,657				(19,440)
Ending balance, amount at Mar. 31, 2018	$ 3,691	$ 1,649	68,824,144	603,720	(56,291,892)	$ (34,515)	13,106,797
Beginning balance, shares at Dec. 31, 2017	3,724,547	1,648,657				(14,535)
Beginning balance, amount at Dec. 31, 2017	$ 3,725	$ 1,649	68,574,974	975,877	(55,845,766)	$ (26,529)	13,683,930
Share-based compensation expense							716,833
Net income (loss)							(1,157,750)
Ending balance, shares at Sep. 30, 2018	3,784,712	1,648,657				(33,840)
Ending balance, amount at Sep. 30, 2018	$ 3,785	$ 1,649	68,869,036	582,573	(56,753,346)	$ (57,847)	12,645,850
Beginning balance, shares at Mar. 31, 2018	3,690,648	1,648,657				(19,440)
Beginning balance, amount at Mar. 31, 2018	$ 3,691	$ 1,649	68,824,144	603,720	(56,291,892)	$ (34,515)	13,106,797
Repurchase of common and preferred shares, shares	(37,320)					(5,400)
Repurchase of common and preferred shares, amount	$ (38)		(120,409)		70,909	$ (8,679)	(58,217)
Foreign currency translation adjustment				(250,631)			(250,631)
Share-based compensation expense			63,095				63,095
Net income (loss)					(193,336)		(193,336)
Ending balance, shares at Jun. 30, 2018	3,653,328	1,648,657				(24,840)
Ending balance, amount at Jun. 30, 2018	$ 3,653	$ 1,649	68,766,830	353,089	(56,414,319)	$ (43,194)	12,667,708
Repurchase of common and preferred shares, shares	(62,200)					(9,000)
Repurchase of common and preferred shares, amount	$ (62)		(194,984)		116,017	$ (14,653)	(93,682)
Foreign currency translation adjustment				229,484			229,484
Share-based compensation expense, shares	193,584
Share-based compensation expense	$ 194		297,190				297,384
Net income (loss)					(455,044)		(455,044)
Ending balance, shares at Sep. 30, 2018	3,784,712	1,648,657				(33,840)
Ending balance, amount at Sep. 30, 2018	$ 3,785	$ 1,649	68,869,036	582,573	(56,753,346)	$ (57,847)	12,645,850
Beginning balance, shares at Dec. 31, 2018	3,784,712	1,648,657				(33,840)
Beginning balance, amount at Dec. 31, 2018	$ 3,785	$ 1,649	68,751,871	344,182	(67,127,122)	$ (57,847)	1,916,518
Foreign currency translation adjustment				73,145			73,145
Share-based compensation expense			58,840				58,840
Net income (loss)					(211,986)		(211,986)
Ending balance, shares at Mar. 31, 2019	3,784,712	1,648,657				(33,840)
Ending balance, amount at Mar. 31, 2019	$ 3,785	$ 1,649	68,810,711	417,327	(67,339,108)	$ (57,847)	1,836,517
Beginning balance, shares at Dec. 31, 2018	3,784,712	1,648,657				(33,840)
Beginning balance, amount at Dec. 31, 2018	$ 3,785	$ 1,649	68,751,871	344,182	$ (67,127,122)	$ (57,847)	1,916,518
Share-based compensation expense							361,698
Net income (loss)							346,401
Ending balance, shares at Sep. 30, 2019	4,438,578	1,648,657			(66,943,958)
Ending balance, amount at Sep. 30, 2019	$ 4,439	$ 1,649	69,196,136	442,635	$ (33,840)	$ (57,847)	2,643,055
Beginning balance, shares at Mar. 31, 2019	3,784,712	1,648,657				(33,840)
Beginning balance, amount at Mar. 31, 2019	$ 3,785	$ 1,649	68,810,711	417,327	(67,339,108)	$ (57,847)	1,836,517
Foreign currency translation adjustment				50,233			50,233
Preferred dividends paid					(163,236)		(163,236)
Share-based compensation expense			(1,100)				(1,100)
Preferred shares issued as compensation, shares	653,866
Preferred shares issued as compensation, amount	$ 654		(82,567)				83,221
Net income (loss)					(23,247)		(23,247)
Ending balance, shares at Jun. 30, 2019	4,438,578	1,648,657				(33,840)
Ending balance, amount at Jun. 30, 2019	$ 4,439	$ 1,649	68,892,178	467,560	(67,525,591)	$ (57,847)	1,782,388
Foreign currency translation adjustment				(24,925)			(24,925)
Share-based compensation expense			303,958				303,958
Net income (loss)					$ 581,634		581,634
Ending balance, shares at Sep. 30, 2019	4,438,578	1,648,657			(66,943,958)
Ending balance, amount at Sep. 30, 2019	$ 4,439	$ 1,649	$ 69,196,136	$ 442,635	$ (33,840)	$ (57,847)	$ 2,643,055