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The following summary reflects stock option activity and related information: (Details) - $ / shares		12 Months Ended
	Aug. 27, 2021	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Outstanding at beginning		2,440,700	2,500,000
Weighted average exercise price beginning			$ 1.36
Granted	187,500	249,000	187,500
Exercise Price granted		$ 11.80	$ 12.20
Expired			(246,800)
Cancelled or Exercised			$ 1.36
Weighted average exercise price beginning		$ 2.19
Exercised		(310,000)
Exercised		$ 1.34
Outstanding at ending		2,379,700	2,440,700
Weighted average exercise price ending		$ 3.31	$ 2.19

X

- Definition

The element represents options granted.

+ References

No definition available.

+ Details

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Namespace Prefix:	empr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The element represents outstanding at beginning.

+ References

No definition available.

+ Details

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X

- Definition

The element represents share based compensation arrangements by share based payment award options granted in period weighted average exercise price.

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- Definition

The element represents share based compensation arrangements by share based payment award options granted in period weighted average expired price.

+ References

No definition available.

+ Details

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X

- Definition

The element represents stock issued during period shares stock options expired.

+ References

No definition available.

+ Details

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X

- Definition

The element represents weighted average exercise price beginning.

+ References

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+ Details

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Namespace Prefix:	empr_
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X

- Definition

The element represents weighted average exercise pricegranted.

+ References

No definition available.

+ Details

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Namespace Prefix:	empr_
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Balance Type:	na
Period Type:	duration

X

- References

No definition available.

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Balance Type:	na
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X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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X

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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X

- Definition

Number of share options (or share units) exercised during the current period.

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