Balance Sheets - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,186,636	$ 6,780,429
Accounts receivable, net	523,989	1,082,957
Inventories	1,078,653	2,861,864
Collaborator Payments Receivable	1,174,092	0
Prepaid expenses and other current assets	672,487	860,915
Total current assets	6,635,857	11,586,165
Fixed assets, net	299,295	407,339
Operating Lease, Right-of-Use Asset	1,541,975	1,968,062
Other long-term assets	29,650	30,314
Total assets	8,506,777	13,991,880
Current liabilities:
Accounts payable	638,546	1,298,084
Accrued expenses	2,612,907	2,236,633
Accrued Sales Return provisions	663,306	1,101,658
Deferred Collaboration Income	0	1,956,522
Total current liabilities	3,914,759	6,592,897
Operating Lease, Liability, Noncurrent	1,018,508	1,301,172
Total liabilities	4,933,267	7,894,069
Commitments and contingencies
Stockholders’ equity:
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	978	738
Additional paid-in capital	197,305,396	197,113,646
Accumulated deficit	(193,732,875)	(191,016,591)
Total stockholders’ equity	3,573,510	6,097,811
Total liabilities and stockholders’ equity	8,506,777	13,991,880
Non-Convertible Preferred Stock
Stockholders’ equity:
Preferred stock	0	0
Convertible preferred stock
Stockholders’ equity:
Preferred stock	11	18
Total stockholders’ equity	$ 11	$ 18