Net Income (Loss) Attributable to ORBCOMM Inc. Common Stockholders - Summary of Basic and Diluted Calculations of EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net loss attributable to ORBCOMM Inc. common stockholders	$ (10,574)	$ (6,975)
Weighted average number of common shares outstanding:
Basic number of common shares outstanding	79,073	78,313
Diluted number of common shares outstanding	79,073	78,313
Earnings per share:
Basic	$ (0.13)	$ (0.09)
Diluted	$ (0.13)	$ (0.09)