Income Taxes - Schedule of Income Taxes Differs from Amount Computed by Applying Statutory U.S. Federal Income Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income tax expense at U.S. statutory rate of 34%	$ 2,063	$ 3,500	$ 262
State income taxes, net of federal benefit	466	196	566
Effect of foreign subsidiaries	7	146	630
Unremitted earnings of Japan subsidiary		2,455
Foreign tax credit	(1,646)	(1,646)
Other permanent items	(193)	(13)	(10)
Permanent items in connection with the purchase of noncontrolling interests in Satcom		(268)
Change in valuation allowance	(1,048)	(2,980)	(621)
Income tax	$ 1,295	$ 1,390	$ 827