Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
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
Unrecognized tax benefits	$ 592,000	$ 592,000	$ 592,000
Valuation allowance	74,907,000	75,744,000
Increase in valuation allowance of deferred tax assets	800,000	3,200,000	$ 12,100,000
Interest and penalties	3,000	3,000
Cumulative interest and penalties	47,000	$ 44,000
Unrecognized tax benefits that would impact the effective tax rate	200,000
Anticipated decrease in gross unrecognized tax benefits within next twelve months	$ 200,000
Tax year under income tax examination	2011
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 111,200,000
Net operating loss carryforwards, expiry terms	Federal NOL carryforwards will expire from 2024 through 2035
Tax credit carryforwards	$ 2,500,000
Federal income tax returns subject to examination description	Federal income tax returns of the Company are subject to IRS examination for the 2012, 2013, and 2014 tax years
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 107,900,000
Net operating loss carryforwards, expiry terms	State NOL carryforwards will expire 2015 through 2035
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