Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (8,908)	$ (7,360)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	67	81
Non-cash lease expense	109	0
Non-cash stock-based compensation expense	300	282
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(113)	(2)
Accounts payable	259	39
Accrued expenses and other liabilities	(257)	(560)
Lease Liability	(102)	0
Net cash used in operating activities	(8,645)	(7,520)
Cash flows from investing activities:
Cash paid for purchase of property and equipment	(72)	(5)
Net cash used in investing activities	(72)	(5)
Cash flows from financing activities:
Net proceeds from the issuance of common stock and warrants	708	18,715
Payment of taxes for net share settled restricted stock unit issuances	(3)	0
Proceeds from the issuance of common stock upon exercise of pre-funded warrants	72	105
Proceeds from the issuance of common stock in connection with the employee stock purchase plan	1	3
Payments for capital lease obligations less than one year	(6)	0
Net cash provided by financing activities	772	18,823
Net (decrease) increase in cash and restricted cash	(7,945)	11,298
Cash and restricted cash at the beginning of period	14,929	3,631
Cash and restricted cash at the end of period	6,984	14,929
Supplemental disclosure of non-cash investing and financing activities:
Right of use asset obtained in exchange for operating lease liability	620	0
Purchase of property and equipment through short-term financing lease included in accrued expenses and other current liabilities	$ 33	$ 0