Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 10,195,292	$ 11,453,133
Accounts receivable and unbilled receivable	203,480	167,755
Prepaid expenses	954,957	1,144,377
Total current assets	11,353,729	12,765,265
Property and equipment, net	877,823	1,304,433
Operating lease right-of-use assets	697,418	0
Other assets	157,576	102,798
Total Assets	13,086,546	14,172,496
Current liabilities:
Accounts payable	656,304	664,840
Accrued liabilities	3,260,061	1,771,842
Deferred rent	0	486,636
Operating lease liabilities	865,379	0
Total current liabilities	4,781,744	2,923,318
Derivative financial instruments—warrants	4,127	32,315
Operating lease liabilities, net of current portion	860,963	0
Deferred rent, net of current portion	0	1,090,671
Other liabilities	128,368	42,000
Total liabilities	5,775,202	4,088,304
Commitments and contingencies
Stockholders’ equity
Preferred stock, $0.001 par value, 20,000,000 shares authorized; 277,100 designated as Series A Convertible Preferred Stock; 60,600 shares outstanding at December 31, 2019 and December 31, 2018 with liquidation preference of $606,000 at December 31, 2019 and December 31, 2018; 8,860 designated as Series B Convertible Preferred Stock; 0 shares outstanding at December 31, 2019 and 2018, respectively; 200,000 designated as Series C Convertible Preferred Stock; 0 shares outstanding at December 31, 2019 and De	60	60
Common stock, $0.0001 par value, 150,000,000 shares authorized; 8,593,633 and 3,831,879 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively	8,312	7,742
Additional paid-in capital	217,172,528	202,267,605
Service receivables	(971,673)	0
Accumulated deficit	(208,897,883)	(192,191,215)
Total stockholders’ equity	7,311,344	10,084,192
Total Liabilities and Stockholders’ Equity	$ 13,086,546	$ 14,172,496