Summary of Stock Option Activity (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Number of Shares
Beginning Balance	101,000
Granted	0
Exercised	0
Forfeited	(37,000)
Ending Balance	64,000
Exercisable	64,000
Options vested and expected to vest thereafter	64,000
Weighted Average Exercise Price
Beginning Balance	$ 5.31
Granted	$ 0
Exercised	$ 0
Forfeited	$ 7.29
Ending Balance	$ 4.17
Exercisable	$ 4.17
Options vested and expected to vest thereafter	$ 4.17
Weighted-Average Remaining Contractual Term
Outstanding, end of period	4 years 9 months 18 days
Exercisable, end of period	4 years 9 months 18 days
Options vested and expected to vest thereafter	4 years 9 months 18 days
Aggregate Intrinsic Value
Outstanding, end of period	$ 21,500
Exercisable	21,000
Options vested and expected to vest thereafter	$ 21,500