UNAUDITED CONDENSED INTERIM BALANCE SHEETS - USD ($)	May 31, 2017	Aug. 31, 2016
Current
Cash and cash equivalents	$ 222,702	$ 31,034
Marketable securities	0	18,780
Accounts receivable	6,773	11,012
Prepaid expenses and deposit	46,519	83,286
Total current assets	275,994	144,112
Non-Current
Long term investments in affiliated company	0	2
Mineral Property	0	83,750
Long term investments	1	0
Lithium Technology	22,500	12,500
Total Assets	298,495	240,364
Current
Accounts payable	209,550	236,242
Shares Subscription Received	0	1,334
Due to related parties	194,151	138,923
Total Current Liabilities	403,701	376,499
STOCKHOLDERS' EQUITY
Share capital Authorized: 200,000,000 common shares with a par value of $0.001 per share Issued and outstanding: 102,298,031 common shares at May 31, 2017 and August 31,2016: 89,528,460	102,299	89,528
Additional paid-in capital	12,875,361	12,214,934
Deficit accumulated during the exploration stage	(13,082,866)	(12,440,597)
Total Stockholders' Equity	(105,206)	(136,135)
Total Liabilities and Stockholders' Equity	$ 298,495	$ 240,364

Deficit accumulated during the exploration stage

No definition available.

Name:	enrt_DeficitAccumulatedDuringTheExplorationStage
Namespace Prefix:	enrt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).