Financial Highlights - Summary of Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 05, 2024	Jan. 29, 2021
Per Share Data:
Net Asset Value Per Share, Beginning Balance	$ 13.15	$ 16.4	$ 13.03	$ 14.97
Net investment income	2.31	2.26	1.5	1.29
Net realized and unrealized gains/(losses) on investments	(0.33)	(3.22)	3.59	(0.81)
Costs related to acquisition of Trinity Capital Holdings and Legacy Funds				(0.82)
Net increase/(decrease) in net assets resulting from operations	1.98	(0.96)	5.09	(0.34)
Offering costs	(0.09)	(0.12)	(0.29)	(0.58)
Effect of shares issued and repurchased	0.19	0.16	(0.15)	(0.02)
Equity component of convertible notes			(0.02)	0.03
Distributions	(2.04)	(2.33)	(1.26)	(1.03)
Total increase/(decrease) in net assets	0.04	(3.25)	3.37	(1.94)
Net Asset Value Per Share, Ending Balance	$ 13.19	$ 13.15	$ 16.4	$ 13.03
Shares outstanding, end of period	46,323,712	34,960,672	27,229,541	18,321,274
Weighted average shares outstanding, basic	38,910,150	31,672,089	25,980,797	18,092,494
Weighted average shares outstanding, diluted	42,705,875	35,189,709	29,320,597
Total return based on net asset value	15.80%	(5.60%)	35.50%	(6.10%)
Total return based on market value	55.80%	(29.00%)	33.20%
Ratio/Supplemental Data:
Per share market value at end of period	$ 14.53	$ 10.93	$ 17.58		$ 14.39	$ 14
Net assets, end of period	$ 611,159	$ 459,649	$ 446,533	$ 238,748
Ratio of total expenses to average net assets	17.90%	16.30%	11.60%	14.30%
Ratio of net investment income to average net assets	17.50%	15.70%	10.50%	10.50%
Ratio of interest and credit facility expenses to average net assets	8.60%	7.50%	5.50%	7.60%
Portfolio turnover rate	41.70%	33.70%	47.90%	36.50%
Asset coverage ratio	194.70%	174.10%	195.80%	177.00%