Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss	$ (21,558)	$ (106,735)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of warrant liability	(27,879)	64,139
Depreciation and amortization	10,875	11,070
Share-based compensation	12,948	4,220
Amortization of debt issuance costs and discount	1,005	261
Deferred taxes	527	8
Loss (gain) on disposal of long-lived assets	(922)	82
Loss on impairment of intangible assets, including goodwill	2,209	14,618
Other	162	243
Changes in operating assets and liabilities:
Accounts receivable	(3,051)	(2,283)
Prepaid expense and other assets	(5,813)	(1,781)
Accounts payable, accrued expense and other liabilities	18,985	5,379
Deferred merchant booking	(4,363)	2,036
Contract liability	669	228
Net cash used in operating activities	(16,206)	(8,515)
Cash flows from investing activities:
Proceeds from asset dispositions	1,140	123
Purchases of property, equipment and software	(1,478)	(1,171)
Payment of payroll costs capitalized to software in progress	(1,607)	(2,427)
Purchase of equity in unconsolidated affiliate	(480)	0
Other	0	(29)
Net cash used in investing activities	(2,425)	(3,504)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	14,553	25,910
Proceeds from debt issuance	0	3,000
Payment of debt issuance cost	(1,526)	(18)
Repayments of debt	(2,250)	0
Payment of contingent consideration related to business acquisitions	(900)	(940)
Payments of capital lease obligations	0	(179)
Net cash provided by financing activities	9,877	27,773
Net increase (decrease) in cash, cash equivalents and restricted cash	(8,754)	15,754
Cash, cash equivalents and restricted cash:
Beginning of period	34,302	18,548
End of period	25,548	34,302
Supplemental cash flow information:
Cash paid for interest	4,273	4,060
Cash paid for income taxes	233	0
Supplemental schedule of non-cash investing and financing activities:
Issuance of common stock	59,907	0
Issuance of common stock upon conversion of debt instruments	0	174
Common stock subscription payable to unconsolidated affiliate	$ 520	$ 0