XML 89 R85.htm IDEA: XBRL DOCUMENT v2.4.0.6

401(k) Plan (Details Textual) (401 (k) Plan [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
401 (k) Plan [Member]
401 k Plan (Textual) [Abstract]
Employer Contribution to plan	50.00%
Percentage of employee eligible for compensation in the form of shares	6.00%
Contributions expense	$ 130,000	$ 165,000	$ 191,000

X

- Definition

Defined contribution plan eligible compensation employer maximum contribution percentage.

+ References

No definition available.

+ Details

Name:	stem_DefinedContributionPlanEligibleCompensationEmployerMaximumContributionPercentage
Namespace Prefix:	stem_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	stem_FourZeroOneKPlanTextualAbstract
Namespace Prefix:	stem_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration