Income Taxes - Reconciliation of Income Tax Expenses By Applying Federal Income Tax Rate to Loss Before Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income tax credit at statutory rates	$ (842)	$ (813)
Nondeductible expenses	2	2
State income tax, net of federal benefits	(127)	(122)
Other	4	1
Increase in valuation allowance	963	932
Total