Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 6,863,353	$ 5,981,384
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion of commercial mortgage loans held-for-investment discounts	(24,773)	0
Amortization of commercial mortgage loans held-for-investment premiums	361,227	0
Accretion of collateralized loan obligations discounts	207,767	872,869
Amortization of deferred offering costs	(11,201)	(40,000)
Amortization of deferred financing costs	1,260,660	771,017
Loss on extinguishment of debt	1,663,926	0
Unrealized loss on mortgage servicing rights	300,666	1,603,052
Restricted stock compensation expense	10,867	17,343
Net change in:
Accrued interest receivable	(1,067,059)	61,860
Deferred offering costs	0	40,000
Other assets	(371,732)	(453,092)
Accrued interest payable	216,110	(393,517)
Fees and expenses payable to Manager	472,199	123,596
Other accounts payable and accrued expenses	2,043,121	39,675
Net cash provided by operating activities	11,925,131	8,624,187
Cash flows from investing activities:
Purchase of commercial mortgage loans held-for-investment	(647,459,391)	(52,580,443)
Principal payments from commercial mortgage loans held-for-investment	391,394,015	88,907,741
Investment related receivable	(48,890,010)	(9,247,423)
Due to affiliate	0	71,727
Net cash (used in) provided by investing activities	(304,955,386)	27,151,602
Cash flows from financing activities:
Proceeds from issuance of common stock	0	5,747,375
Net proceeds from issuance of preferred stock	57,258,435	0
Proceeds from collateralized loan obligation	833,750,000	0
Proceeds from credit facility	7,500,000	0
Payment of collateralized loan obligations	(465,316,126)	(27,740,358)
Payment of deferred financing costs	(8,731,741)	0
Dividends paid on common stock	(7,732,853)	(5,518,082)
Dividends paid on preferred stock	(926,249)	(7,500)
Net cash provided by (used in) financing activities	415,801,466	(27,518,565)
Net increase in cash, cash equivalents and restricted cash	122,771,211	8,257,224
Cash, cash equivalents and restricted cash, beginning of period	69,375,356	16,011,830
Cash, cash equivalents and restricted cash, end of period	192,146,567	24,269,054
Supplemental disclosure of cash flow information
Cash paid for interest	8,996,957	10,747,082
Cash paid for income taxes	0	180,898
Non-cash investing and financing activities information
Dividends declared but not paid at end of period	$ 3,443,476	$ 2,123,980