Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Deferred tax liabilities noncurrent	$ 4,464,000	$ 4,566,000
Foreign tax credit carry forwards	$ 5,300,000
Foreign tax credit carryforwards, expiration start year	2023
Foreign tax credit carryforwards, expiration end year	2024
Effective income tax rate from continuing operations	(8.60%)	(7.90%)
Indefinitely reinvested foreign earnings	$ 0
Income tax provision (benefit), federal rate	21.00%	21.00%
Unrecognized tax benefit	$ 0	$ 0	$ 354,000
Unrecognized tax benefit that would affect the effective tax rate if recognized	0
Unrecognized tax benefit reduction due to settlements with taxing authorities and or statute of limitations expirations	0
Unrecognized tax benefit, interest or penalties accrued	$ 0	0
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Minimum change in ownership percentage	50.00%
Measurement of change in ownership period	3 years
Minimum change in ownership percentage held by shareholders directly or indirectly	5.00%
Income tax expense (benefit) related to interest on liability (refund) claim	$ (1,300)
California Franchise Tax Board
Income Taxes [Line Items]
Income tax examination resulted tax charge	0
New York City Audit
Income Taxes [Line Items]
Income tax examination resulted tax charge		0
New York City Audit | Tax Years 2011 Through 2014
Income Taxes [Line Items]
Income tax examination resulted tax charge		$ 500,000
Federal
Income Taxes [Line Items]
Operating loss carry forwards	172,700,000
Operating loss carry forwards, expiration amount	$ 19,000,000
Operating loss carry forwards, expiration year	2037
State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carry forwards	$ 36,500,000
Operating loss carry forwards, expiration start year	2034
Operating loss carry forwards, expiration end year	2034