Net Loss per Common Share (Basic and Diluted Income (Loss) Per Share) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Basic and diluted net income (loss) per common share calculation:
Net income (loss)	$ (3,112,000)	$ (14,493,000)	$ (516,000)
Accretion of Series B redeemable convertible preferred stock	(1,725,000)	(338,000)
Net (loss) income attributable to common stockholders	$ (4,837,000)	$ (14,831,000)
Weighted average number of shares of common stock outstanding - basic	5,883,503	4,245,816
Net loss per share of common stock - basic	$ (0.82)	$ (3.49)
Weighted average number of shares of common stock outstanding - diluted	5,883,503	4,245,816
Net loss per share of common stock - diluted	$ (0.82)	$ (3.49)