Income Taxes-Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 70,000,000
Deferred Tax Assets, Net of Valuation Allowance	169,000	269,000
Increase (Decrease) in Income Taxes	129,000
Loss In Net Operating Loss Carry Forwards	3,000,000	3,000,000
Minimum Percentage Of Change In Ownership	50.00%	50.00%
Operating Losses Carryforwards Expiration Date	2018
Percentage Of Income Tax Realized Upon Ultimate Settlement	50.00%
US subsidiary [Member]
Deferred Tax Assets, Net of Valuation Allowance		$ 129,000