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.

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

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

Significant Accounting Policies - Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) store	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Disaggregation of revenue
Number of additional retail outlets \| store	4
Real estate
Disaggregation of revenue
Revenue	$ 61,488	$ 52,183	$ 27,717
Homebuilder homesite sales, Lot residuals
Disaggregation of revenue
Revenue	2,500	1,000
Homebuilder homesite sales, Certain products and services
Disaggregation of revenue
Revenue	$ 2,300	$ 1,100