Summary of Significant Accounting Policies, Basic and Diluted Net Loss Per Share (Details) - Options, Warrants and Unvested Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive shares excluded from computation of diluted loss per common share (in shares)	3,022,582	2,674,000
Range of exercise prices - lower range limit (in dollars per share)	$ 0.88	$ 0.88
Range of exercise prices - upper range limit (in dollars per share)	$ 24.40	$ 24.40