Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Line Items]
Income tax expense (benefit), continuing operations
Deferred tax assets, tax credit carryforwards	3,186,000	2,921,000	2,537,000
Expire 2023 [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets, operating loss carryforwards, domestic	109,919,000
Expire 2027 [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets, operating loss carryforwards, state and local	99,930,000
New York State [Member]
Income Tax Disclosure [Line Items]
Proceeds from income tax refunds	62,000	532,000	367,000
Expire 2024 [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets, tax credit carryforwards	3,313,000
Expire 2022 [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets, operating loss carryforwards, domestic	$ 318,000