Summary Of Stock Option Activity (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013
Number of Shares
Beginning Balance	433,000
Granted	8,000
Exercised	(25,500)
Forfeited	(131,500)
Ending Balance	284,000
Exercisable	276,000
Options vested and expected to vest thereafter	284,000
Weighted Average Exercise Price
Beginning Balance	$ 3.60
Granted	$ 3.87
Exercised	$ 0.95
Forfeited	$ 4.83
Ending Balance	$ 3.28
Exercisable	$ 3.27
Options vested and expected to vest thereafter	$ 3.28
Weighted-Average Remaining Contractual Term
Outstanding, end of period	2 years 4 months 24 days
Exercisable, end of period	2 years 2 months 12 days
Options vested and expected to vest thereafter	2 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding, end of period	$ 433,900
Exercisable	433,900
Options vested and expected to vest thereafter	$ 433,900