XML 30 R46.htm IDEA: XBRL DOCUMENT v3.20.1

SUBSEQUENT EVENT (Details) - USD ($) $ in Millions	Apr. 30, 2020	Mar. 30, 2020	Mar. 23, 2020
Subsequent Event [Line Items]
Lease term		10 years	10 years
Fixed lease rent payment		$ 11.1	$ 5.6
Subsequent event
Subsequent Event [Line Items]
Lease term	71 months
Fixed lease rent payment	$ 1.1

X

- Definition

It represents amount of fixed lease rent payments under the initial term.

+ References

No definition available.

+ Details

Name:	mrkr_FixedLeaseRentPayment
Namespace Prefix:	mrkr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: