CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 7,297,468	$ 9,829,624
Restricted cash	0	126,595
Accounts receivable	9,069	9,939
Inventory	164,597	186,920
Prepaid expenses and other current assets	675,277	162,088
Total current assets	8,146,411	10,315,166
Property and equipment, net	38,008	74,460
Total assets	8,184,419	10,389,626
Current liabilities:
Accounts payable	186,349	342,530
Accrued expenses and other current liabilities	724,769	764,340
Total current liabilities	911,118	1,106,870
Total liabilities	911,118	1,106,870
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at March 31, 2019 and December 31, 2018; none issued or outstanding at March 31, 2019 and December 31, 2018	0	0
Common stock, $0.0001 par value; 100,000,000 shares authorized at March 31, 2019 and December 31, 2018; 18,069,476 and 18,069,476 shares issued at March 31, 2019 and December 31, 2018, and 18,068,017 and 18,067,392 shares outstanding at March 31, 2019 and December 31, 2018, respectively	1,807	1,807
Additional paid-in capital	142,463,199	142,242,224
Accumulated deficit	(135,191,705)	(132,961,275)
Total stockholders' equity	7,273,301	9,282,756
Total liabilities and stockholders' equity	$ 8,184,419	$ 10,389,626