SIGNIFICANT ACCOUNTING POLICIES - CASH AND CASH EQUIVALENTS(Details)	12 Months Ended
Dec. 31, 2016
Cash and cash equivalents
Minimum collateral percentage on reverse repurchase agreements principal	102.00%

The required collateral minimum percentage for RRAs is either U.S. Treasury or Federal Agency securities at a minimum rate of the RRAs' principal.

No definition available.

Name:	stdy_MinimumCollateralPercentageOnReverseRepurchaseAgreementsPrincipal
Namespace Prefix:	stdy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration