XML 57 R34.htm IDEA: XBRL DOCUMENT
v3.23.1

INCOME TAXES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
INCOME TAXES |
Schedule of Deferred Tax Assets and Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Years Ended | ​
​ | ​ | December 31, | ​
​ |  | 2022 |  | 2021 |
Deferred Tax Assets | ​ | ​ | ​ | ​ | ​
Net Operating Loss Carryforward | ​ | 30,072,000 | ​ | 29,087,000 | ​
Stock Compensation | ​ | 5,642,000 | ​ | 5,599,000 | ​
Accrued Expenses | ​ | — | ​ | 510,000 | ​
License Agreement | ​ | — | ​ | 127,000 | ​
Capitalized R&E | ​ | 4,818,000 | ​ | — | ​
Research and Development | ​ | 733,000 | ​ | 733,000 | ​
Charitable Contributions | ​ | — | ​ | 8,000 | ​
Operating Lease Liability | ​ | 1,611,000 | ​ | 2,514,000 | ​
​ | ​ | 42,876,000 | ​ | 38,578,000 | ​
Less: Valuation Allowance | ​ | (41,413,000) | ​ | (36,401,000) | ​
Total Deferred Tax Assets | ​ | 1,463,000 | ​ | 2,177,000 | ​
​ | ​ | ​ | ​ | ​ | ​
Deferred Tax Liabilities | ​ | ​ | ​ | ​ | ​
Fixed Assets | ​ | (304,000) | ​ | (94,000) | ​
Right-of-Use Assets | ​ | (1,159,000) | ​ | (2,083,000) | ​
Total Deferred Tax Liabilities | ​ | (1,463,000) | ​ | (2,177,000) | ​
​ | ​ | ​ | ​ | ​ | ​
Net Deferred Tax Assets/(Liabilities) | ​ | — | ​ | — | ​
​
Summary Of Expected Tax Expense Benefit Based On Federal Statutory Rates Reconciled With Actual Tax Provision Benefit | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the Years Ended December 31, |
​ | ​ | 2022 | ​ | 2021 |
​ | ​ | ​ | ​ | Percent of | ​ | ​ | ​ | Percent of | ​
​ |  | Amount |  | Pretax Loss |  | Amount |  | Pretax Loss |
U.S. federal statutory rate | ​ | (6,285,000) |  | 21.00 | % | (8,795,000) |  | 21.00 | %
State taxes, net of federal benefit | ​ | (44,000) |  | 0.15 | % | (48,000) |  | 0.11 | %
Tax rate change | ​ | 10,000 |  | -0.03 | % | (291,000) |  | 0.69 | %
Permanent Differences | ​ |  |  |  | ​ |  |  | ​ | ​
- Other permanent differences | ​ | 288,000 |  | -0.96 | % | 262,000 |  | -0.63 | %
Change in valuation allowance | ​ | 5,012,000 |  | -16.75 | % | 8,769,000 |  | -20.94 | %
Deferred true-up | ​ | 1,019,000 |  | -3.40 | % | 103,000 |  | -0.25 | %
Income tax provision/(benefit) | ​ | — |  | 0.00 | % | — |  | 0.00 | %
​

X
- Definition Tabular disclosure of expected tax expense benefit based on federal statutory rate is reconciled with actual tax provision benefit. + References No definition available. + Details
Name: | mrkr_SummaryOfExpectedTaxExpenseBenefitBasedOnFederalStatutoryRateIsReconciledWithActualTaxProvisionBenefitTableTextBlock
Namespace Prefix: | mrkr_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration