No definition available.

Name:	us-gaap_ChangeInContractWithCustomerLiabilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=leaf_MarketplacesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=leaf_ProductSociety6GroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=leaf_ProductSaatchiArtGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=leaf_ServiceSociety6GroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=leaf_ServiceSaatchiArtGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=leaf_MediaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Revenue Recognition - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of revenue
Total revenue	$ 50,968	$ 35,789	$ 83,833	$ 69,827
Deferred Revenue
Revenue recognized			2,100
Product
Disaggregation of revenue
Total revenue	35,922	15,869	52,304	33,410
Service
Disaggregation of revenue
Total revenue	15,046	19,920	31,529	36,417
Marketplaces
Disaggregation of revenue
Total revenue	38,647	19,189	57,388	40,027
Marketplaces \| Product
Disaggregation of revenue
Total revenue	35,922	15,869	52,303	33,410
Marketplaces \| Product, Society6 Group
Disaggregation of revenue
Total revenue	34,582	15,181	50,352	32,179
Marketplaces \| Product, Saatchi Art Group
Disaggregation of revenue
Total revenue	1,340	688	1,951	1,231
Marketplaces \| Service
Disaggregation of revenue
Total revenue	2,725	3,320	5,085	6,617
Marketplaces \| Service, Society6 Group
Disaggregation of revenue
Total revenue	83	22	306	22
Marketplaces \| Service, Saatchi Art Group
Disaggregation of revenue
Total revenue	2,642	3,298	4,779	6,595
Media
Disaggregation of revenue
Total revenue	12,321	16,600	26,445	29,800
Media \| Product
Disaggregation of revenue
Total revenue			1
Media \| Service
Disaggregation of revenue
Total revenue	$ 12,321	$ 16,600	$ 26,444	$ 29,800