Stockholders’ Equity - (Narrative) (Details) - USD ($)					3 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Dec. 28, 2020	Oct. 01, 2020	Aug. 18, 2020	Aug. 05, 2020	Jun. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2015	Dec. 31, 2020	Aug. 17, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding (in shares)					13,065,696	13,065,696			12,802,690
Common Stock, Dividends, Per Share, Declared, Annualized						$ 0.40
Distributions declared per common share (in dollars per share)					$ 0.10	0.10	$ 0.04889
Reverse stock split			0.4115
Common stock, par value (in dollars per share)					$ 0.01	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)					300,000,000	300,000,000			300,000,000
Common stock repurchased (in shares)				6,672	0
Stock repurchased during period, value				$ 300,000		$ 183,000
Vesting and conversion of Class B Units									$ 1,200,000
Proceeds from sale of common stock, net					$ 2,843,000	$ 2,843,000
Preferred stock, par value (in dollars per share)					$ 0.01	$ 0.01			$ 0.01
Termination notice period						10 days
Total Stockholders’ Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased during period, value						$ 183,000
Vesting and conversion of Class B Units									$ 900,000
Proceeds from sale of common stock, net					$ 2,843,000	$ 2,843,000
Non-controlling Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting and conversion of Class B Units					$ 200,000				$ 200,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock repurchased (in shares)						26,236
Redemption of class A units (in shares)			37		13,100	13,100
Proceeds from sale of common stock, net					$ 3,000	$ 3,000
Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding (in shares)					9,900,000	9,900,000
Reverse stock split			0.1029
Common stock, par value (in dollars per share)				$ 0.0972	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)				9,750,000
Authorized amount of shares to be repurchased					$ 100,000,000	$ 100,000,000
Common Class A | At The Market Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from sale of common stock, net		$ 250,000,000.0
Sale of stock, number of shares issued in transaction (in shares)					254,602	254,602
Sale of stock, consideration received on transaction					$ 3,400,000	$ 3,400,000
Sale of stock, commissions paid					34,000	34,000
Stock issuance costs					500,000	500,000
Payment of costs						$ 1,000,000.0
Decrease in prepaid expense					$ 500,000
Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding (in shares)					3,200,000	3,200,000
Common stock, par value (in dollars per share)					$ 0.01	$ 0.01
Common stock dividends (in Shares)				3
Common stock repurchased (in shares)	26,236
Stock repurchased during period, value	$ 200,000
Shares repurchased tender offer shares (in shares)	65,000
Average share price (in dollars per share)	$ 7.00
Series A preferred stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, par value (in dollars per share)					$ 0.01	$ 0.01
Preferred stock, value					$ 55.00	$ 55.00
Right to receive shares (in shares)					0.001	0.001
Class A Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting and conversion of class B units (in shares)			65,498					65,498
Shares held (in shares)										37
Class A Units | Advisor
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares held (in shares)			52,398
Class A Units | Third Party
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares held (in shares)									13,100