Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,126,206	$ 6,780,429
Accounts receivable, net of allowances of $70,000 and $25,000 at December 31, 2019 and 2018, respectively	298,967	1,082,957
Inventories	1,163,714	2,861,864
Collaborator Payments Receivable	189,008	0
Prepaid expenses and other current assets	652,919	860,915
Total current assets	5,430,814	11,586,165
Fixed assets, net	273,448	407,339
Operating Lease, Right-of-Use Asset	1,159,774	1,968,062
Other long-term assets	29,650	30,314
Total assets	6,893,686	13,991,880
Current liabilities:
Accounts payable	725,658	1,298,084
Accrued product returns	1,443,574	1,659,173
Accrued Sales Return provisions	689,000	1,101,658
Operating Lease, Liability, Current	588,546	577,460
Deferred Collaboration Income	0	1,956,522
Total current liabilities	3,446,778	6,592,897
Operating Lease, Liability, Noncurrent	916,674	1,301,172
Total liabilities	4,363,452	7,894,069
Commitments and contingencies (Note 8)
Stockholders’ equity
Common stock, $0.0001 par value; 25,000,000 and 100,000,000 authorized at December 31, 2019 and 2018; 1,400,674 and 738,029 shares issued and outstanding at December 31, 2019 and 2018, respectively	140	74
Additional paid-in capital	197,319,698	197,114,310
Accumulated deficit	(194,789,605)	(191,016,591)
Total stockholders’ equity	2,530,234	6,097,811
Total liabilities and stockholders’ equity	6,893,686	13,991,880
Preferred stock
Stockholders’ equity
Preferred stock	0	0
Convertible preferred stock
Stockholders’ equity
Preferred stock	$ 1	$ 18