Earnings Per Share - Schedule of Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Numerator for basic calculation-Net income/(loss) attributable to P10	$ 3,584	$ 1,978	$ 2,215	$ (88)	$ 1,127	$ 1,841	$ 7,777	$ 2,880
Adjustment for:
Preferred dividends attributable to redeemable noncontrolling interest	494			153			1,483	306
Proportionate share of subsidiary's earnings attributable to subsidiary's convertible preferred stock under assumed conversion	(1,563)			(233)			(3,599)	(568)
Numerator for earnings per share assuming dilution	$ 2,515			$ (168)			$ 5,661	$ 2,618
Denominator:
Denominator for basic calculation - Weighted-average shares	62,464			62,464			62,464	62,464
Weighted shares assumed upon exercise of stock options	4,323			0			4,238	1,978
Denominator for earnings per share assuming dilution	66,787			62,464			66,702	64,442
Earnings per share - basic	$ 0.06			$ (0.00)			$ 0.12	$ 0.05
Earnings per share - diluted	$ 0.04			$ (0.00)			$ 0.08	$ 0.04