This amount represents the total amount of the cash portion of the retention plan.

No definition available.

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- Definition

Represents the number of installments.

+ References

No definition available.

+ Details

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

+ Details

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Period Type:	duration

- Definition

The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s).

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

+ Details

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Period Type:	instant

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of vesting of share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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- Details

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- Details

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- Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Restructuring Costs (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($) installment	Jun. 30, 2018 USD ($) installment	Jun. 30, 2018 USD ($) installment $ / shares
Restructuring Costs
Reduction in workforce (as a percent)	30.00%
Cash portion of the retention plan	$ 600	$ 600	$ 600
Stock option exercise price (in dollars per share) \| $ / shares			$ 0.58
Number of installments for option to vest \| installment	4	4	4
Restructuring Costs
Charges		$ 416	$ 416
Payments			(52)
Ending balance	$ 364	364	$ 364
Vesting on June 20, 2018
Restructuring Costs
Percentage of installments for option to vest			25.00%
Vesting on December 31, 2018
Restructuring Costs
Percentage of installments for option to vest			25.00%
Vesting on June 30, 2019
Restructuring Costs
Percentage of installments for option to vest			25.00%
Vesting on December 31, 2019
Restructuring Costs
Percentage of installments for option to vest			25.00%
Accrued severance
Restructuring Costs
Charges			$ 380
Payments			(52)
Ending balance	328	328	328
Accrued retention bonus
Restructuring Costs
Charges			36
Ending balance	$ 36	$ 36	$ 36