Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Excess tax benefits from employee restricted stock included in net operating loss carryforwards	$ 500,000
AMT credit carryforwards	500,000
Tax credit carryforwards, Expire year	2027
Valuation allowance				53,200,000
Interest and penalties	3,000	38,000
Cumulative interest and penalties	41,000	38,000
Unrecognized tax benefits	592,000	592,000	200,000	324,000
Tax year under income tax examination	2011
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	84,400,000
Net operating loss carryforwards, expiry terms, federal taxes	Federal net operating loss carryforwards will expire from 2024 through 2033
Tax credit carryforwards	3,400,000
Federal income tax returns subject to examination description	Federal income tax returns of the Company are subject to IRS examination for the 2012 tax year.
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	150,000,000
Net operating loss carryforwards, expiry terms, federal taxes	State net operating loss carryforwards will expire 2014 through 2033
Tax credit carryforwards	$ 700,000
Federal income tax returns subject to examination description	State income tax returns are subject to examination for a period of three to four years after filing.