Organization And Summary Of Significant Accounting Policies (Activity In Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Organization And Summary Of Significant Accounting Policies [Abstract]
Allowance for doubtful account, Balance at Beginning of Period	$ 970	$ 221
Allowance for doubtful account, Recovery	(86)
Allowance for doubtful account, Bad Debt Expense		789
Allowance for doubtful account, Write-Offs Charged to Allowance	(124)	(41)
Allowance for doubtful account, Effects Of Foreign Currency Exchange Rates	11	1
Allowance for doubtful account, Balance at End of Period	$ 771	$ 970

Allowance For Doubtful Accounts Receivable Bad Debt Expense

No definition available.

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Namespace Prefix:	evol_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Allowance For Doubtful Accounts Receivable, Effects Of Foreign Currency Exchange Rates

+ References

No definition available.

+ Details

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Namespace Prefix:	evol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of recoveries of receivables doubtful of collection that were previously charged off.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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