UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS DETAILS - Tenant Receivables, Net (Q2) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Balance Sheet Disclosure [Abstract]
Straight-line rent	$ 5,163,964	$ 4,344,388	$ 3,541,238
Tenant rent	384,661	204,775	420,959
Tenant reimbursements	1,607,198	2,116,627
Total	$ 7,155,823	$ 6,665,790	$ 6,224,764

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Name:	us-gaap_AccountsReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant