Prepaid Expenses and Other Current Assets - Components of Prepaid Expenses and Other Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Prepaid corporate insurance	$ 92	$ 84
Deposit on inventory	477
Prepaid expenses and other current assets	53	65
Total prepaid expenses and other current assets	$ 622	$ 149