SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Revenue	$ 20,713	$ 17,256	$ 37,437	$ 32,555
Adjusted EBITDA	(3,284)	(1,482)	(10,187)	(3,738)
Depreciation and amortization	(2,746)	(2,894)	(5,464)	(5,755)
Share-based compensation expense	(417)	(321)	(12,022)	(596)
Other income	(44)	(1)	(55)	(20)
Other loss (gain)	(554)	21	(523)	52
Operating loss	(7,045)	(4,677)	(28,251)	(10,057)
Other income (expense)
Interest expense	(1,255)	(1,181)	(2,661)	(2,199)
Other income, net	44	1	55	20
Change in fair value of warrant liability	10,055	1,760	18,665	8,329
Other gain (loss)	554	(21)	523	(52)
Total other income, net	9,398	559	16,582	6,098
Income (loss) before income taxes	2,353	(4,118)	(11,669)	(3,959)
Assets	89,954		89,954		$ 103,537
Capital expenditures			2,294	1,785
Travel & entertainment segment
Other income (expense)
Capital expenditures	600	500	1,600	900
Technology & Data Intelligence
Other income (expense)
Capital expenditures	100	400	500	800
Operating Segments | Travel & entertainment segment
Segment Reporting Information [Line Items]
Revenue	16,826	15,288	31,724	29,481
Adjusted EBITDA	2,002	1,763	2,169	2,367
Other income (expense)
Assets	67,990		67,990		75,820
Operating Segments | Technology & Data Intelligence
Segment Reporting Information [Line Items]
Revenue	3,369	878	4,552	1,009
Adjusted EBITDA	(1,974)	(670)	(3,492)	(1,150)
Other income (expense)
Assets	6,372		6,372		5,105
Corporate Entity and Other
Segment Reporting Information [Line Items]
Revenue	518	1,090	1,161	2,065
Adjusted EBITDA	(3,312)	$ (2,575)	(8,864)	$ (4,955)
Other income (expense)
Assets	$ 15,592		$ 15,592		$ 22,612