XML 39 R24.htm IDEA: XBRL DOCUMENT
v3.20.2

LEASES (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
LEASES |
Schedule of quantitative information about operating leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Three Months Ended |  | For the Nine Months Ended |
​ | ​ | September 30, | ​ | September 30, | ​
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Operating lease expense summary: |  | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Operating lease expense | ​ | $ | 375,000 | ​ | $ | 55,000 | ​ | $ | 533,000 | ​ | $ | 165,000 | ​
Short-term lease expense | ​ |  | — | ​ |  | 27,000 | ​ |  | 22,000 | ​ |  | 73,000 | ​
Variable lease expense | ​ |  | 69,000 | ​ |  | 27,000 | ​ |  | 85,000 | ​ |  | 65,000 | ​
Total | ​ | $ | 444,000 | ​ | $ | 109,000 | ​ | $ | 640,000 | ​ | $ | 303,000 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other information: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Operating cash flows - operating leases | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 362,000 | ​
Weighted-average remaining lease term as of September 30, 2020 – operating leases | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | 9.6 | ​
Weighted-average discount rate as of adoption date – operating leases | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | 5.7 | %
​
Schedule of maturities of operating leases | ​
​ | ​ | ​ | ​
Three months ended December 31, 2020 |  | $ | 205,000
Year ended December 31, 2021 | ​ |  | 1,077,000
Year ended December 31, 2022 | ​ |  | 1,278,000
Year ended December 31, 2023 | ​ |  | 1,542,000
Year ended December 31, 2024 | ​ | ​ | 1,826,000
Thereafter | ​ | ​ | 10,540,000
Total | ​ | ​ | 16,468,000
Less present value discount | ​ |  | (4,241,000)
Operating lease liabilities included in the Condensed Consolidated Balance Sheet at September 30, 2020 | ​ | $ | 12,227,000

X
- Definition Tabular disclosure of lease cost and other information related to operating leases. + References No definition available. + Details
Name: | mrkr_ScheduleOfLeaseCostAndOtherInformationRelatedToOperatingLeasesTableTextBlock
Namespace Prefix: | mrkr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration