Condensed Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 18,954,000	$ 18,473,000
Prepaid expenses	715,000	490,000
Deferred offering costs	0	21,000
Other assets	17,000	25,000
Total current assets	19,686,000	19,009,000
Deposits	8,000	8,000
Total assets	19,694,000	19,017,000
Current liabilities:
Accounts payable	2,044,000	4,025,000
Accrued liabilities	438,000	1,010,000
Term loan - current portion	9,437,000	1,355,000
Total current liabilities	11,919,000	6,390,000
Long-term liabilities:
Term loan		8,683,000
Other liabilities	1,000	3,000
Total liabilities	11,920,000	15,076,000
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized as of December 31, 2018 and 2017, no shares issued or outstanding as of December 31, 2018 and 2017.
Common stock, $0.001 par value; 100,000,000 shares authorized as of December 31, 2018 and 2017, 14,265,411 and 10,633,042 shares issued and outstanding at December 31, 2018 and 2017, respectively.	22,000	18,000
Additional paid in capital	91,863,000	64,397,000
Accumulated deficit	(84,111,000)	(60,474,000)
Total stockholders’ equity	7,774,000	3,941,000
Total liabilities and stockholders’ equity	$ 19,694,000	$ 19,017,000