Balance Sheets - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 5,226,213	$ 3,126,206
Accounts receivable, net of allowances of $25,000 and $70,000 at December 31, 2020 and 2019, respectively	334,297	298,967
Inventories	1,051,282	1,163,714
Collaborator Payments Receivable	0	189,008
Prepaid expenses and other current assets	478,074	652,919
Total current assets	7,089,866	5,430,814
Fixed assets, net	183,494	273,448
Operating Lease, Right-of-Use Asset	692,692	1,159,774
Other long-term assets	28,523	29,650
Total assets	7,994,575	6,893,686
Current liabilities:
Accounts payable	142,316	725,658
Accrued product returns	998,442	1,443,574
Accrued Sales Return provisions	545,000	689,000
Operating Lease, Liability, Current	599,632	588,546
Total current liabilities	2,285,390	3,446,778
Operating Lease, Liability, Noncurrent	461,410	916,674
Total liabilities	2,746,800	4,363,452
Commitments and contingencies (Note 8)
Stockholders’ equity
Common stock, $0.0001 par value; 25,000,000 authorized at December 31, 2020 and 2019; 3,793,739 and 1,400,674 shares issued and outstanding at December 31, 2020 and 2019, respectively	379	140
Additional paid-in capital	202,129,195	197,319,698
Accumulated deficit	(196,881,800)	(194,789,605)
Total stockholders’ equity	5,247,775	2,530,234
Total liabilities and stockholders’ equity	$ 7,994,575	$ 6,893,686
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares outstanding (in shares)	3,793,739	1,400,674
Convertible preferred stock
Stockholders’ equity
Preferred stock	$ 1	$ 1
Total stockholders’ equity	1	1
Preferred Non-Convertible Stock
Stockholders’ equity
Preferred stock	$ 0	$ 0