Earnings Per Share (Details) - USD ($)	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income attributable to Jerash Holdings (US), Inc.'s Common Stockholders	$ 813,859	$ 1,549,488
Denominator:
Denominator for basic earnings per share (weighted-average shares)	11,325,000	11,325,000
Dilutive securities - unexercised warrants and options	5,210	147,363
Denominator for diluted earnings per share (adjusted weighted-average shares)	11,330,210	11,472,363
Basic earnings per share	$ 0.07	$ 0.14
Diluted earnings per share	$ 0.07	$ 0.14