Equity and Cost Method Businesses - Summarized Financial Information Related to Companies Accounted for Under Equity Method of Accounting (Detail) - Dec. 31, 2014 - USD ($) $ in Thousands	Total
Schedule Of Equity Method Investments [Line Items]
Cash and cash equivalents	$ 4,487
Other current assets	966
Non-current assets	51
Total assets	5,504
Current liabilities (including current portion of long-term debt)	9,411
Non-current liabilities	57
Long-term debt	0
Stockholders' deficit	(3,964)
Total liabilities and stockholders' deficit	5,504
Total carrying value	$ 0
Acquirgy
Schedule Of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	25.00%