Consolidated Statement of Changes in Temporary Equity and Stockholders' (Deficiency) Equity - USD ($)	Series B Convertible Redeemable Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Total
Balance beginning at Dec. 31, 2016		$ 429,153	$ (14,070)	$ 80,102,189	$ (10,459,242)	$ (67,631,569)	$ 2,426,461
Balance beginning, shares at Dec. 31, 2016		42,915,379	4,411
Series B preferred stock issued for cash	$ 7,759,500
Series B preferred stock issued for cash, shares	775,931
Common stock issued for cash, net of issuance costs of $4,500		$ 225		40,275			40,500
Common stock issued for cash, net of issuance costs of $4,500, shares		22,500
Common stock issued in satisfaction of deferred revenue		$ 622		123,917			124,539
Common stock issued in satisfaction of deferred revenue, shares		62,270
Exchange of 8% notes for Series B preferred stock	$ 1,267,324
Exchange of 8% notes for Series B preferred stock, shares	126,739
Stock-based compensation: Common stock issued under 401(k) profit sharing plan		$ 678		73,190			73,868
Stock-based compensation: Common stock issued under 401(k) profit sharing plan, shares		67,770
Stock-based compensation: Options and warrants				623,907			623,907
Dividends				(60,515)			(60,515)
True-up to transfer agent's records		$ (4)		4
True-up to transfer agent's records, shares		(373)
Common stock returned to the Company to satisfy receivable
Net loss						(7,912,512)	(7,912,512)
Other comprehensive loss					(336,568)		(336,568)
Balance ending at Dec. 31, 2017	$ 9,026,824	$ 430,674	$ (14,070)	80,902,967	(10,795,810)	(75,544,081)	(5,020,320)
Balance ending, shares at Dec. 31, 2017	902,670	43,067,546	4,411
Common stock issued in satisfaction of deferred revenue
Stock-based compensation: Common stock issued under 401(k) profit sharing plan		$ 1,163		80,236			81,399
Stock-based compensation: Common stock issued under 401(k) profit sharing plan, shares		116,284
Stock-based compensation: Options and warrants				716,249			716,249
Common stock issued for cash		$ 18,911		1,304,784			1,323,695
Common stock issued for cash, shares		1,890,993
Beneficial conversion feature on convertible debt issued				227,414			227,414
Common stock issued upon conversion of convertible debt and interest		$ 12,855		797,020			809,875
Common stock issued upon conversion of convertible debt and interest, shares		1,285,517
Dividends declared on Series B Convertible Redeemable Preferred Stock				(474,719)			(474,719)
Common stock issued in satisfaction of dividends payable		$ 3,781		260,491			264,272
Common stock issued in satisfaction of dividends payable, shares		378,193
Common stock returned to the Company to satisfy receivable			$ (32,285)				(32,285)
Common stock returned to the Company to satisfy receivable, shares			46,122
Net loss						(5,678,418)	(5,678,418)
Other comprehensive loss					(2,314,409)		(2,314,409)
Balance ending at Dec. 31, 2018	$ 9,026,824	$ 467,384	$ (46,355)	$ 83,814,442	$ (13,110,219)	$ (81,222,499)	$ (10,097,247)
Balance ending, shares at Dec. 31, 2018	902,670	46,738,533	50,533