Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,816,485	$ 3,126,206
Accounts receivable, net	386,124	298,967
Inventories	1,153,560	1,163,714
Collaborator Payments Receivable	181,330	189,008
Prepaid expenses and other current assets	340,369	652,919
Total current assets	4,877,868	5,430,814
Fixed assets, net	250,041	273,448
Operating Lease, Right-of-Use Asset	1,048,937	1,159,774
Other long-term assets	29,650	29,650
Total assets	6,206,496	6,893,686
Current liabilities:
Accounts payable	623,193	725,658
Accrued expenses	1,064,580	1,443,574
Accrued Sales Return provisions	603,000	689,000
Operating Lease, Liability, Current	591,370	588,546
Total current liabilities	2,882,143	3,446,778
Operating Lease, Liability, Noncurrent	810,235	916,674
Total liabilities	3,692,378	4,363,452
Commitments and contingencies
Stockholders’ equity:
Preferred stock	1	1
Common stock, $0.0001 par value; 100,000,000 shares authorized at June 30, 2019 and December 31, 2018; 9,781,755 and 7,380,463 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	168	140
Additional paid-in capital	197,960,925	197,319,698
Accumulated deficit	(195,446,976)	(194,789,605)
Total stockholders’ equity	2,514,118	2,530,234
Total liabilities and stockholders’ equity	6,206,496	6,893,686
Non-Convertible Preferred Stock
Stockholders’ equity:
Preferred stock	0	0
Convertible preferred stock
Stockholders’ equity:
Total stockholders’ equity	$ 1	$ 1