Summary of Incentive Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Shares
Outstanding at the beginning of year, shares	55,000	55,000
Granted, shares
Exercised, shares	(35,000)
Expired/Forfeited, shares	(20,000)
Outstanding at end of year, shares	0	55,000
Options exercisable at year-end, shares		55,000
Options available for future grant
Weighted Exercise Price
Outstanding at the beginning of year, weighted exercise price	$ 0.10	$ 0.10
Granted, weighted exercise price
Exercised, weighted exercise price	$ 0.10
Expired/Forfeited, weighted exercise price	$ 0.10
Outstanding at end of year, weighted exercise price		$ 0.10
Options exercisable at year-end, weighted exercise price		$ 0.10
Options available for future grant, weighted exercise price
Weighted average fair value of options granted during the year