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The Company, Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Potential common stock equivalents (in shares)	5,523,326	5,881,396
Series C Convertible Preferred Stock [Member]
Loss per common share [Abstract]
Loss attributable to each class	$ (18)	$ (193)
Weighted average number of shares outstanding during the period (in shares)	368	4,577
Basic and diluted loss per share (in dollars per share)	$ (48.59)	$ (42.24)
Warrants [Member]
Loss per common share [Abstract]
Number of warrants to purchase common stock (in shares)			403,090
Common Stock [Member]
Loss per common share [Abstract]
Loss attributable to each class	$ (4,394)	$ (3,597)
Weighted average number of shares outstanding during the period (in shares)	33,609,922	31,978,665
Basic and diluted loss per share (in dollars per share)	$ (0.13)	$ (0.11)
Common Stock Purchase Warrants [Member]
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Potential common stock equivalents (in shares)	434,791	1,517,528
Restricted Stock Units [Member]
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Potential common stock equivalents (in shares)	131,247	128,417
Common Stock Options [Member]
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Potential common stock equivalents (in shares)	4,957,288	4,235,451