CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net loss	$ (12,824)	$ (33,108)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,014	1,694
Amortization of financing costs charged to interest expense	50	229
Accretion of debt discount and non-cash interest expense	0	2,326
Termination of U.K. agreement expense	4,780	11,245
Change in fair value of warrant liabilities, net	0	7,561
Other non-cash expense, net	1,003	3,857
Amortization of deferred FI implementation costs	1,384	758
Settlement Of Paid-in-Kind Interest	0	8,311
Change in operating assets and liabilities:
Accounts receivable	(7,024)	7,701
Prepaid expenses and other assets	(1,622)	(1,509)
Deferred FI implementation costs	0	(2,250)
Recovery of deferred FI implementation costs	2,312	2,692
Accounts payable	(306)	(839)
Other accrued expenses	323	(237)
FI Share liability	2,932	(3,185)
Customer Incentive liability	4,009	(1,409)
Net cash used in operating activities	(2,969)	(12,785)
Investing activities
Acquisition of property and equipment	(4,019)	(1,492)
Acquisition of patents	(5)	(12)
Capitalized software development costs	(1,139)	(657)
Net cash used in investing activities	(5,163)	(2,161)
Proceeds from Issuance of Long-term Debt	0	47,435
Financing activities
Principal payments of debt	(10,010)	(51,811)
Proceeds from issuance of common stock	1,213	70,527
Equity issuance costs	0	(1,897)
Debt issuance costs	(93)	(48)
Net cash from (used in) financing activities	(8,890)	64,206
Effect of exchange rates on cash, cash equivalents and restricted cash	(99)	(54)
Net increase (decrease) in cash, cash equivalents and restricted cash	(17,121)	49,206
Cash, cash equivalents, and restricted cash — Beginning of period	59,870	21,262
Cash, cash equivalents, and restricted cash — End of period	42,749	70,468
Supplemental schedule of non-cash investing and financing activities:
Amounts accrued for property and equipment	53	1,225
Amounts accrued for capitalized software development costs	$ 0	$ 86