Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Tax Benefit from Stock Options Exercised	$ 0	$ (7)	$ (67)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	3,394	4,631
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	140	117	65
Deferred Tax Assets, Valuation Allowance	7,832	2,006	$ 1,833	$ 1,868
Fully Vested Options Expired Unexercised
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	908	379
Restricted Stock
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	421	$ 58
United States
Deferred Tax Assets, Valuation Allowance	6,554
United States
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	420
ITALY
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	4,473
Deferred Tax Assets, Valuation Allowance	$ 1,230