Net Assets - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands							3 Months Ended			9 Months Ended
	Jun. 12, 2023	May 15, 2023	Aug. 01, 2022	Mar. 24, 2021	Feb. 23, 2021	Aug. 04, 2015	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Class Of Stock [Line Items]
Common stock, shares issued		4,500,000			4,000,000		88,210,748			88,210,748		82,053,537
Cash proceeds from issuance of common stock, net of underwriting fees and offering costs		$ 77,600			$ 84,900
Stock issued upon conversion of convertible notes, shares			4,360,125						2,324,820
Stock issued upon conversion of convertible notes, value			$ 77,600					$ 77,642
Percentage of current market price per share										95.00%
Stock repurchase program, authorized amount						$ 50,000	$ 50,000			$ 50,000
Stock repurchase program period						6 months
Stock repurchase program, expiration date										May 08, 2023
Number of shares repurchased							0	180,542		0	180,542
Weighted average price per share								$ 16.62			$ 16.62
Total cost								$ 3,000			$ 3,000
Overallotment Option
Class Of Stock [Line Items]
Common stock, shares issued	675,000			49,689
Cash proceeds from issuance of common stock, net of underwriting fees and offering costs	$ 11,700			$ 1,000
Common Stock
Class Of Stock [Line Items]
Shares issued, price per share		$ 17.33			$ 21.3
Stock issued upon conversion of convertible notes, shares								4,360,125
Stock issued upon conversion of convertible notes, value								$ 44
Number of shares repurchased								(180,542)
2022 Convertible Notes
Class Of Stock [Line Items]
Value of debt converted			$ 79,200						$ 42,800