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Stockholders' Equity - Stock Issuances - Additional Information (Details) - USD ($)	1 Months Ended			6 Months Ended
	Jul. 31, 2015	Feb. 28, 2015	Oct. 31, 2013	Jun. 30, 2016	Dec. 31, 2015	Mar. 31, 2013
Stockholders Equity Note [Line Items]
Common stock, par value (in dollars per share)				$ 0.01	$ 0.01
Sale of common stock, net of expenses (in shares)	600,000	153,750	81,875
Proceeds of common stock issued, net of related expenses	$ 6,000,000
ATM Programs [Member] \| Cowen and Company, LLC [Member]
Stockholders Equity Note [Line Items]
Common stock, par value (in dollars per share)						$ 0.01
Aggregate proceeds from sale of common stock under equity offering program, maximum						$ 50,000,000
Sale of common stock, net of expenses (in shares)				3,100
Proceeds of common stock issued, net of related expenses				$ 17,500