Debt (Details Narrative) - USD ($)							9 Months Ended		12 Months Ended
Debt (Details Narrative) - USD ($)	Nov. 03, 2016	Sep. 15, 2016	Aug. 11, 2016	Apr. 25, 2016	Jan. 14, 2016	Aug. 01, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Gain on disposal of assets							$ 24,502
Note payable							$ 300,000
Number of shares of restricted common stock issued							75,000
Warrants							$ 45,000
Market price per share							$ 0.95
Total beneficial conversion feature							$ 39,278
Number of shares restricted common stock issued, value							$ 71,250
Nexfuels Warrant [Member]
Number of warrants held during period							1,006,000
Warrants							$ 43,513
Western Interiors [Member]
Repurchase of shares during period									18,717	33,085
Promissory Notes [Member]
Repayment of promissory notes						$ 393,795			$ 341,405
Debt owned amount							488,298
Accrued interest payable							$ 25,659
Business combination reduction in purchase price						374,920
Note payable	$ 300,000
Debt instrument interest rate	12.00%
Debt instrument maturity date	Jan. 31, 2017
Debt conversion price per share	$ 0.80						$ 0.80
Number of shares of restricted common stock issued	75,000						75,000
Number of warrants held during period	50,000
Accrued interest							$ 5,720
Market price per share							$ 0.95
Total beneficial conversion feature							$ 56,250
Number of shares restricted common stock issued, value							71,250
Total expense							90,516
Promissory Notes [Member] \| Director and Officer [Member]
Debt owned amount							50,000
Accrued interest payable							2,788
Debt instrument interest rate					5.00%
Debt instrument maturity date					Sep. 30, 2016
Proceeds from convertible debt					$ 50,000
Default interest rate					8.00%
Debt conversion rate					30.00%
Promissory Notes [Member] \| Director [Member]
Debt owned amount							50,000
Accrued interest payable							2,410
Debt instrument interest rate					5.00%
Debt instrument maturity date		Dec. 31, 2016			Dec. 31, 2016
Proceeds from convertible debt					$ 50,000
Default interest rate					8.00%
Debt conversion rate					30.00%
Promissory Notes [Member] \| Director One [Member]
Debt owned amount							100,000
Accrued interest payable							5,836
Debt instrument interest rate			15.00%
Debt instrument maturity date			Aug. 11, 2017
Proceeds from convertible debt			$ 100,000
Debt conversion rate			30.00%
Equity interest percentage			85.71%
Promissory Notes [Member] \| Director Two [Member]
Debt owned amount							50,000
Accrued interest payable							4,110
Debt instrument interest rate				5.00%
Debt instrument maturity date				Dec. 31, 2016
Proceeds from convertible debt				$ 50,000
Promissory Notes [Member] \| Nexfuels Warrant [Member]
Warrants							2,128
Promissory Notes [Member] \| Maximum [Member]
Debt owned amount						768,715
Promissory Notes [Member] \| Minimum [Member]
Debt owned amount						$ 393,795
Promissory Notes [Member] \| Western Interiors [Member]
Repurchase of shares during period						14,368
Gain on disposal of assets						$ 44,100
Line of Credit [Member] \| Bank [Member]
Debt face amount							$ 350,000
Debt floor rate							7.00%
Line-of-credit							$ 106,103
Line of Credit [Member] \| Bank [Member] \| Prime Rate [Member]
Debt variable interest rate							2.50%
Line of credit maturity date							Nov. 30, 2016
Installment Notes [Member]
Debt instrument interest rate							8.29%		5.81%
Amount of monthly installment									$ 3,437
Installment Notes [Member] \| Unrelated Parties [Member]
Proceeds from convertible debt							$ 26,000		$ 34,374

T-REX OIL, INC. 10-Q