Stock-Based Compensation - Additional Information (Detail)	6 Months Ended				6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Incentive Stock Option Plan [Member]	May 31, 2013 Incentive Stock Option Plan [Member]	Jun. 30, 2013 Incentive Stock Option Plan [Member] Minimum [Member]	Jun. 30, 2013 Non Employee Directors Stock Option Plan [Member]	May 31, 2009 Non Employee Directors Stock Option Plan [Member]	Jun. 30, 2013 Non Employee Directors Stock Option Plan [Member] Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares to be issued under incentive stock option plan			3,000,000			205,000
Shares for future grants		185,860			15,000
Option exercisable rate		25.00%			25.00%
Options expire period		15 years			15 years
Share based compensation options exercisable period		2020			2017
Stock price percentage to fair value at grant date				100.00%			100.00%
Vesting period in years		7 years			4 years
Options Exercisable Description		The options are exercisable beginning one year from the date of grant at the rate of 25% per year for four years, and expire at the end of fifteen years from the date of grant.			The options are exercisable beginning four years from the date of grant at the rate of 25% per year for four years
Stock option plan termination date		Dec. 31, 2014
Number of options granted for non-employee director	10,000