Earnings (Loss) Per Share - Summary of Computation of Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net loss attributable to common stockholders
Net loss attributable to Paragon 28, Inc.	$ (9,236)	$ (527)
Less: Dividends on Series B convertible preferred stock	0	(469)
Net loss attributable to common stockholders	$ (9,236)	$ (996)
Weighted-average common stock outstanding:
Basic	76,447,454	46,852,175
Diluted	76,447,454	46,852,175
Loss per share:
Basic	$ (0.12)	$ (0.02)
Diluted	$ (0.12)	$ (0.02)