Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended				12 Months Ended		48 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Schedule Of Income Taxes [Line Items]
Possible additional federal and state income taxes estimated from the income tax assessment							$ 3,000,000
Provision for income tax expense (benefit)	$ 1,600,000		$ 500,000	$ 900,000	$ 3,067,000	$ (1,469,000)
Statutory federal rate					34.00%	34.00%
Income (loss) of foreign subsidiaries before taxes					$ 2,367,000	$ 2,966,000
U.S. federal
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	1,400,000				$ 1,400,000
Net operating loss carryforwards, expiration year					2034
Maximum
Schedule Of Income Taxes [Line Items]
Estimated income tax adjustment liable for taxes, penalties and interest	100,000	$ 400,000			$ 500,000
States
Schedule Of Income Taxes [Line Items]
Net operating loss carry forwards, amount	$ 300,000				$ 300,000