Name:	sbmt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredInPeriodGross
Namespace Prefix:	sbmt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The element represents share based compensation arrangement by share based payment award options issued in period gross.

No definition available.

Name:	sbmt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIssuedInPeriodGross
Namespace Prefix:	sbmt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The element represents share based compensation arrangements by share based payment award options exercised in period weighted average exercise price.

No definition available.

Name:	sbmt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageExercisePrice
Namespace Prefix:	sbmt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The element represents share based compensation arrangements by share based payment award options expired in period weighted average exercise price.

No definition available.

Name:	sbmt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpiredInPeriodWeightedAverageExercisePrice
Namespace Prefix:	sbmt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The element represents share based compensation arrangements by share based payment award options issue in period weighted average exercise price.

No definition available.

Name:	sbmt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsIssueInPeriodWeightedAverageExercisePrice
Namespace Prefix:	sbmt_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

Number of non-vested options outstanding.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-4

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Number of non-vested options forfeited.

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2