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Related Party Transactions (Detail) (USD $)	3 Months Ended		1 Months Ended
Related Party Transactions (Detail) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Oct. 31, 2013
SP Corporate Services LLC
Provision of services	$ 2,200,000	$ 2,200,000
Accounts payable	100,000
Mutual Securities, Inc.
Paid commissions	11,000	123,000
iGo
Fixed annual fee			400,000
WebBank \| Interest Income
Interest income	16,000	7,000
WebBank \| Short-term deposits
Short-term deposits	$ 9,300,000
Steel Excel \| Percentage Owned By Steel Partners
Ownership (as a percent)	57.20%