Commitments and Contingencies (Details Textual) $ / shares in Units, ¥ in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) $ / shares	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) $ / shares	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 CNY (¥)	Jul. 31, 2019 USD ($)	Mar. 31, 2019 CNY (¥)
Commitments and Contingencies (Textual)
Commitment and contingencies, description	Shanghai La Go Go Fashion Company Limited ("LA GO GO") filed a complaint against Shanghai Chijing Investment Management Co., Ltd. ("Shanghai Chijing") for unpaid rent of RMB0.27 million ($0.04 million) per month in the Shanghai People's Court for Jiading District (the "District Court"). The rent arrears began accumulating from April 2018 to the actual payment date. In July 2019, Shanghai Chijing filed counterclaims against LA GO GO to claim RMB10.19 million ($1.45 million) in damages, alleging that LA GO GO had not fulfilled its corresponding obligations as a landlord. As a result, the District Court froze the bank accounts of both Shanghai Chijing and LA GO GO. As of December 31, 2019, a total balance of RMB15.38 million ($2.2 million) was frozen in the bank accounts of LA GO GO. As of December 31, 2019, the Company had booked this restricted cash in other receivables. On March 10, 2020, the District Court entered a judgment in favor of LA GO GO and dismissed most of Shanghai Chijing's counterclaims. The District Court ordered Shanghai Chijing to pay to LA GO GO an aggregate sum of RMB4.77 million ($0.68 million), which is the accumulated unpaid rent from April 2018 to January 2020. The District Court also ordered LA GO GO to pay Shanghai Chijing RMB1.49 ($0.21 million) for the expenses incurred from remodeling. Both parties were required to pay the monetary damages within ten days after the District Court's decision. LA GO GO appealed to the Shanghai Second Appellate Court (the "Appellate Court") to claim more damages, while Shanghai Chijing appealed to reverse the judgment. LA GO GO later requested to withdraw its appeal, which was granted by the Appellate Court. In June 2020, the Appellate Court entered a final decision to dismiss the appeal of Shanghai Chijing and sustained the District Court's judgment. LA GO GO has not received RMB4.77 million ($0.68 million) in monetary damages from Shanghai Chijing as of June 30, 2020, and has applied for compulsory enforcement with the District Court. The total balance of RMB15.38 million ($2.2 million) in LA GO GO's bank accounts were unfrozen after the final decision in July.
Revenues		$ 50,086	$ 77,316	$ 108,441	$ 165,272
General administrative expenses		$ 5,971	$ 7,337	11,755	$ 14,867
Cash paid for operating leases				$ 4,800
Weighted average discount rate | $ / shares		$ 4.35		$ 4.35
Weighted average remaining lease term		31 years		31 years
Shanghai Chijing [Member]
Commitments and Contingencies (Textual)
Counter claim								$ 1,450
Total balance						$ 2,200
Shanghai Chijing [Member] | RMB [Member]
Commitments and Contingencies (Textual)
Counter claim								$ 10,190
Total balance | ¥							¥ 15,380
LA GO GO [Member]
Commitments and Contingencies (Textual)
Unpaid rent	$ 680
LA GO GO [Member] | RMB [Member]
Commitments and Contingencies (Textual)
Unpaid rent | ¥									¥ 4,770
Operating Lease Commitment [Member]
Commitments and Contingencies (Textual)
Revenues				$ 4,600
General administrative expenses				$ 200