Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Cash flows used in operating activities
Net loss	$ (25,659)	$ (14,212)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	5,210	2,056
Write-off of debt issuance costs	1,505	0
Depreciation	133	288
Amortization	696	187
Warrants issued for services	43	86
Change in fair value of warrants	60	56
Common stock issued for consulting services	0	112
Loss on disposal of fixed asset	0	70
Deferred rent	(26)	(91)
Changes in operating assets and liabilities:
Accounts payable	888	893
Lease liabilities	684	0
Other accrued liabilities	2,529	0
Prepaid and other current assets	(246)	(311)
Deferred revenue	1,608	3,163
Receivables	(2,233)	(871)
Unbilled receivables	(2,093)	0
Net cash used in operating activities	(16,901)	(8,574)
Cash flows provided by investing activities
Purchases of property and equipment	0	(9)
Deposits and other assets	0	71
Net cash provided by investing activities	0	62
Cash flows provided by financing activities
Debt issuance costs	(2,813)	(317)
Debt termination related fees	(1,956)	0
Proceed from warrant exercise	1,128	150
Proceed from options exercise	1,894	0
Capital lease obligations	69	(30)
Net cash provided by financing activities	27,349	7,303
Net (decrease) increase in cash, cash equivalents and restricted cash	10,448	(1,209)
Cash and restricted cash at beginning of period	3,570	4,779
Cash and restricted cash at end of period	14,018	3,570
Supplemental disclosure of cash flow information:
Right of use asset obtained in exchange for lease obligation	2,574
Interest paid	870	363
Non cash financing and investing activities:
Reclassification of warrant liability to equity upon amendment of the loan agreement	86	0
Warrant issued in connection with 2024 Note	2,354	0
Secured Promissory Note
Cash flows provided by financing activities
Proceeds from debt	0	7,500
Revolving Loan
Cash flows provided by financing activities
Proceeds from debt	7,500	0
Repayments of debt	15,000	0
A/R Facility
Cash flows provided by financing activities
Proceeds from debt	1,938	0
Repayments of debt	1,938	0
GS Loan
Cash flows provided by financing activities
Proceeds from debt	$ 36,527	$ 0

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