STOCKHOLDERS' EQUITY, STOCK-BASED COMPENSATION AND NET LOSS PER SHARE - Net Loss Per Share (Details)	12 Months Ended
Dec. 31, 2018 $ / shares shares
Hotelmobi, Inc. \| Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares) \| shares	1,000,000
CBG Acquisition Warrants \| China Branding Group Limited
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Equity interests issued (in shares) \| shares	40,000
Exercise price (usd per share)	$ 10.00
CBG Financing Warrants \| China Branding Group Limited
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Equity interests issued (in shares) \| shares	3,221,777
Exercise price (usd per share)	$ 4.56
Warrant One \| Hotelmobi, Inc.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price (usd per share)	8.00
Warrant Two \| Hotelmobi, Inc.
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price (usd per share)	$ 12.00

Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Shares

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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