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NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended 124 Months Ended
Jun. 30, 2022
USD ($)
shares
Mar. 31, 2022
USD ($)
shares
Sep. 30, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Dec. 31, 2012
USD ($)
shares
Sep. 30, 2022
USD ($)
shares
Nature of Operation And Significant Accounting Policies [Line Items]                        
Issuance of common stock, net of offering costs (shares) | shares 13,416 14,924 19,545,935 31,592 354,257 3,177,936 7,931 3,465,922 380,936 63,998 12,035,023 19,545,935
Gross Proceeds $ 187,965 $ 209,006 $ 287,476,304 $ 449,515 $ 5,023,843 $ 45,862,995 $ 93,737 $ 48,741,406 $ 5,485,780 $ 899,964 $ 180,522,093 $ 287,476,304
Proceeds for offering expenses and sales load fees                       9,406,067
Offering expenses reimbursements                       131,257
Proceeds from the issuance of common stock     420,004                 278,201,494
Credit Facility payable     $ 197,371,231 175,451,116               $ 197,371,231
Asset coverage ratio     193                 193
Cash balance     $ 242,911                 $ 242,911
Cash equivalents and carried at cost     11,961,055                 11,961,055
Cash held in foreign currency     215,777                 215,777
Cash held in foreign currency at acquisition cost     241,247                  
SBIC Subsidiary | SBA-guaranteed Debentures                        
Nature of Operation And Significant Accounting Policies [Line Items]                        
Maximum borrowing capacity     150,000,000                 150,000,000
Regulatory capital     75,000,000 75,000,000               75,000,000
Credit Facility payable     150,000,000 150,000,000               150,000,000
SBIC II Subsidiary | SBA-guaranteed Debentures                        
Nature of Operation And Significant Accounting Policies [Line Items]                        
Maximum borrowing capacity     175,000,000                 175,000,000
Regulatory capital     87,500,000 87,500,000               87,500,000
Credit Facility payable     $ 156,000,000 $ 100,000,000               $ 156,000,000