Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 0	$ 0
Percentage of valuation allowance	100.00%
Amount of state tax expense	$ 62,000	27,000
Uncertain tax positions	0	0
Interest and penalties	0
Federal [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 0	0
Net operating loss carryforward, expiration date	Dec. 31, 2032
Net operating loss	$ 46,875,000	44,478,000
State [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 0	0
Net operating loss carryforward, expiration date	Dec. 31, 2035
Net operating loss	$ 3,771,000	$ 1,374,000