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Note 14 - Earnings Per Share (Details)	0 Months Ended	12 Months Ended	3 Months Ended
Note 14 - Earnings Per Share (Details)	Oct. 22, 2014	Dec. 31, 2014	Mar. 31, 2015
Note 14 - Earnings Per Share (Details) [Line Items]
Common Stock, Dividend Rate, Percentage	11.00%bsf_CommonStockDividendRatePercentage	11.00%bsf_CommonStockDividendRatePercentage
Warrant [Member]
Note 14 - Earnings Per Share (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1,525,009
Equity Option [Member]
Note 14 - Earnings Per Share (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			239,760
Restricted Stock Units (RSUs) [Member]
Note 14 - Earnings Per Share (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			97,809

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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