SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Cash and Cash Equivalents (Details)	Dec. 31, 2012 M
Cash and Cash Equivalents [Line Items]
Cash Equivalents, Maturity Term Maximum	3

The maximum maturity, in months, of highly liquid investments for it to qualify as a cash equivalent.

No definition available.

Name:	bios_CashEquivalentsMaturityTermMaximum
Namespace Prefix:	bios_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant