CONDENSED 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)		$ 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		(51,960)
Foreign currency translation adjustment				(372,157)			(372,157)
Share-based compensation expense			356,354				356,354
Net loss					(509,370)		(509,370)
Ending balance, shares at Mar. 31, 2018	3,690,648	1,648,657
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)		13,683,930
Share-based compensation expense							419,449
Net loss							(702,706)
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)		12,667,708
Beginning balance, shares at Mar. 31, 2018	3,690,648	1,648,657
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		(58,217)
Foreign currency translation adjustment				(250,631)			(250,631)
Share-based compensation expense			63,095				63,095
Net 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)		12,667,708
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
Repurchase of common and preferred shares, shares				73,145			73,145
Share-based compensation expense			58,840				$ 58,840
Net 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							57,740
Net loss							(235,233)
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	457,646	(67,525,591)	$ (57,847)	1,782,388
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 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	$ 457,646	$ (67,525,591)	$ (57,847)	$ 1,782,388