CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
NET LOSS	$ (20,055)	$ (12,463)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in allowance for doubtful accounts	(32)	(4)
Depreciation and amortization	910	765
Amortization of financing costs charged to interest expense	140	148
Accretion of debt discount and non-cash interest expense	1,500	2,307
Stock compensation expense	2,900	983
Change in the fair value of warrant liabilities, net	9,172	327
Change in the fair value of convertible promissory notes	0	383
Change in the fair value of convertible promissory notes - related parties	0	2,223
Other non-cash expenses	2,253	229
Change in operating assets and liabilities:
Accounts receivable	8,623	6,672
Prepaid expenses and other assets	(1,520)	(551)
Deferred FI implementation costs	1,094	962
Accounts payable	(408)	631
Other accrued expenses	(1,836)	(2,802)
FI Share liability	(2,538)	(4,643)
Customer Incentive liability	(293)	(991)
Total adjustment	19,965	6,639
Net cash used in operating activities	(90)	(5,824)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property and equipment	(418)	(386)
Acquisition of patents	(2)	(16)
Capitalized software development costs	(374)	0
Net cash used in investing activities	(794)	(402)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of debt	0	7,500
Principal payments of debt	(26)	(24)
Proceeds from issuance of common stock	70,490	270
Equity issuance costs	(1,232)	(181)
Net cash from financing activities	69,232	7,565
EFFECT OF EXCHANGE RATES ON CASH, CASH EQUIVALENTS AND RESTRICTED CASH	175	46
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	68,523	1,385
CASH, CASH EQUIVALENTS AND RESTRICTED CASH—beginning of period	21,262	22,968
CASH, CASH EQUIVALENTS AND RESTRICTED CASH—end of period	89,785	24,353
Supplemental schedule of non-cash investing and financing activities:
Cash paid for interest	247	188
Amounts accrued for property and equipment	1,155	15
Amounts accrued for capitalized software development costs	141	0
Stock-based compensation capitalized for software development	$ 6	$ 0