Commitments and Contingencies - Schedule of Contractual Obligations and Commitments (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2014 Officers
Commitments And Contingencies Disclosure [Abstract]
Number of executive officers	3
Employment agreement term	4 years
Employment agreement renewable term	1 year
Employee agreements, severance description	Under these employment agreements, each executive officer is eligible for severance benefits in specified circumstances, including 6 to 12 months of salary.