Capital Stock - Additional Information (Detail) (USD $)	9 Months Ended			1 Months Ended		1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jun. 11, 2014 Underwritten Offering	Jun. 06, 2014 Underwritten Offering	Jun. 11, 2014 Underwriters	Jun. 06, 2014 Underwriters	Jun. 06, 2014 Public
Capital Stock [Line Items]
Common stock shares issued	32,031,426		25,070,386		6,000,000
Common stock par value	$ 0.01		$ 0.01		$ 0.01
Stock issued during period shares new issues						6,900,000	6,000,000
Share price						$ 2.3375	$ 2.3375	$ 2.50
Purchase of additional common stock							900,000
Proceeds from issuance of common stock	$ 15,639,000	$ 1,110,000				$ 16,128,750
Reimbursement expense						150,000
Additional offering expenses				$ 400,000