Stockholders' Equity, Series A 12% Convertible Preferred Stock (Details) - $ / shares		12 Months Ended
	Feb. 04, 2008	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2021	May 23, 2019
Stockholders' Equity [Abstract]
Exercise price of warrant (in dollars per share)						$ 7.00
Share price (in dollars per share)					$ 2.07
Warrants [Member]
Stockholders' Equity [Abstract]
Share price (in dollars per share)						$ 4.01
Series A 12% Convertible Preferred Stock [Member]
Stockholders' Equity [Abstract]
Preferred stock, dividend rate	12.00%
Shares issued, price (in dollars per share)	$ 6.00
Number of shares issued upon exercise of warrant (in shares)	1
Weighted average price percentage	100.00%
Convertible preferred stock (in shares)		25,000	0	410,000
Common stock issued upon conversion (in shares)		4,553		69,312
Shares relating to prorated dividend prior to conversion (in shares)		387
Series A 12% Convertible Preferred Stock [Member] | Scenario 1 [Member]
Stockholders' Equity [Abstract]
Exercise price of warrant (in dollars per share)	$ 9.00
Number of consecutive trading days	20 days
Series A 12% Convertible Preferred Stock [Member] | Scenario 2 [Member]
Stockholders' Equity [Abstract]
Exercise price of warrant (in dollars per share)	$ 12.00
Number of consecutive trading days	15 days
Series A 12% Convertible Preferred Stock [Member] | Minimum [Member]
Stockholders' Equity [Abstract]
Share price (in dollars per share)	$ 18.00