Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2014 Scenario, Forecast [Member]
Income Tax Disclosure [Line Items]
Income tax expense/benefit	$ 85,000	$ 566,000	$ 340,000	$ 1,764,000
Statutory rate			34.00%	34.00%
Tax benefit related to the reversal of a liability for uncertain income taxes			800,000
Additional paid in capital related to tax benefits for stock compensation			486,000
Deferred Tax Assets, Valuation allowances	600,000		600,000		600,000
Domestic deferred tax assets ratable reversal pattern period			15 years
Operating loss carry forward, Expiration period			The carry forward rules allow for up to a 20 year carry forward of net operating losses
Net operating loss carry forward period			20 years
Average period required to utilize future income			26 years
Gross unrecognized tax benefit	900,000		900,000		1,500,000
Reversal related to foreign income tax uncertainties						$ 100,000