Consolidated Statements of Stockholders' Deficit - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Loss, Net
Common stock, shares outstanding, beginning at Dec. 31, 2017		445,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrants exercised (shares)		5,426,917
Common stock, shares outstanding, ending at Dec. 31, 2018	5,872,552	5,872,552
Beginning Balance, amount at Dec. 31, 2017	$ (21,224,797)	$ 601	$ 112,234,058	$ (130,930,284)	$ (570,329)	$ (1,958,843)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(906,714)			(906,714)
Warrants issued	$ 5,213,928		$ 5,213,928
Warrants cancelled	(623,920)		(623,920)
Warrants exercised	$ (489,321)	(5,272)	$ (86,280)		(570,329)
Share-based compensation	64,672		64,672
Accretion of Series A redeemable convertible preferred stock	(254,212)		(254,212)
Dividends on Series A redeemable convertible preferred stock	(1,035,977)		(1,035,977)
Deemed dividends on Series A redeemable convertible preferred stock	(2,269,042)		(2,269,042)
Foreign currency translation	59,035					59,035
Net minimum pension liability	4,706					4,706
Modified retrospective opening balance adjustment	9,717,099			9,717,099
Ending Balance, amount at Dec. 31, 2018	$ (10,765,901)	$ 5,873	113,243,227	(122,119,899)	0	(1,895,102)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrants exercised (shares)		15,181
Restricted stock issued (shares)		31,000
Common stock, shares outstanding, ending at Dec. 31, 2019	5,918,733	5,918,733
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (1,751,954)			(1,751,954)
Restricted stock issued	0	$ 31	(31)
Warrants exercised	0	(15)	(15)
Share-based compensation	32,280		32,280
Accretion of Series A redeemable convertible preferred stock	(389,811)		(389,811)
Dividends on Series A redeemable convertible preferred stock	(1,157,762)		(1,157,762)
Deemed dividends on Series A redeemable convertible preferred stock	0
Foreign currency translation	(4,921)					(4,921)
Net minimum pension liability	6,763					6,763
Ending Balance, amount at Dec. 31, 2019	$ (14,031,306)	$ 5,919	$ 111,727,888	$ (123,871,853)	$ 0	$ (1,893,260)