(Loss) Earnings Per Share - Summary of Computation of Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net (loss) income attributable to common stockholders
Net (loss) income attributable to Paragon 28, Inc.	$ (13,693)	$ 3,498	$ 3,117
Less: Dividends on Series B convertible preferred stock		(812)
Net (loss) income attributable to common stockholders	$ (13,693)	$ 2,686	$ 3,117
Weighted-average common stock outstanding:
Basic	52,916,711	43,510,185	42,499,735
Diluted	52,916,711	60,406,180	61,462,410
(Loss) earnings per share:
Basic	$ (0.26)	$ 0.06	$ 0.07
Diluted	$ (0.26)	$ 0.04	$ 0.05
Stock Awards Outstanding
Weighted-average common stock outstanding:
Dilutive impact of stock awards outstanding		3,083,495	5,150,175
Series A Convertible Preferred Stock
Weighted-average common stock outstanding:
Dilutive impact of Series A convertible preferred stock		13,812,500	13,812,500