Note 18 - Related Party Transactions (Detail) (USD $)				10 Months Ended	5 Months Ended		12 Months Ended						1 Months Ended
	May 31, 2012 Prior to Execution of Share Purchase Agreement [Member] Percent of the Company Owned By Steel Partners [Member]	May 31, 2012 Prior to Execution of Share Purchase Agreement [Member] Percent of BNS owned by Steel Partners [Member]	May 31, 2012 Subsequent to Execution of Share Purchase Agreement [Member] Percent of the Company Owned By Steel Partners [Member]	Jul. 31, 2012 SP Corporate Services LLC [Member] Monthly Fees for Financial Management and Administrative Services [Member]	Dec. 31, 2012 SP Corporate Services LLC [Member] Monthly Fees For Expanded Services [Member]	Dec. 31, 2012 SP Corporate Services LLC [Member]	Dec. 31, 2011 SP Corporate Services LLC [Member]	Dec. 31, 2012 SP Corporate and Other Steel Partner Affiliates [Member] Expense Reimbursements [Member]	Dec. 31, 2011 SP Corporate and Other Steel Partner Affiliates [Member] Expense Reimbursements [Member]	Dec. 31, 2012 Mutual Securities [Member] Commissions [Member]	Dec. 31, 2012 WebBank [Member]	Dec. 31, 2011 Monthly Compensation for Interim President and CEO [Member]	May 31, 2012 SWH, Inc [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price													$ 68,700,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)													2,027,500
Equity Issuance, Per Share Amount (in Dollars per share)													$ 30
Business Acquisition, Cost of Acquired Entity, Cash Paid													7,900,000
Equity, Ownership Percentage	40.00%	85.00%	51.10%
Related Party Transaction, Expenses from Transactions with Related Party				35,000	300,000	2,100,000	300,000			100,000		30,000
Related Party Transaction, Amounts of Transaction								600,000	100,000
Accounts Payable, Related Parties						300,000	100,000
Deposits Assets, Current											15,100,000
Interest Income, Deposits with Financial Institutions											$ 100,000