Preferred Stock, Common Stock and Stockholders' Equity - Summary of Warrants Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Shares, Outstanding beginning balance	118,881
Shares, Outstanding ending balance	118,881	118,881
Weighted Average Exercise Price, Outstanding beginning balance	$ 16.73
Weighted Average Exercise Price, Outstanding ending balance	$ 16.73	$ 16.73
Weighted Average Remaining Contractual Term (Years), Outstanding	4 years 4 months 6 days	5 years 4 months 6 days