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SEGMENT REPORTING - Components of product sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment reporting
Total product sales revenues	$ 243,626	$ 227,539	$ 319,881
Apparel
Segment reporting
Total product sales revenues	78,954	72,871	99,160
Other general merchandise
Segment reporting
Total product sales revenues	157,751	143,536	194,791
Product sales
Segment reporting
Total product sales revenues	$ 236,705	$ 216,407	$ 293,951

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Amount, including 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 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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+ References

No definition available.

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