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