Balance Sheets - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 7,108,915	$ 4,043,681
Accounts receivable, net	1,114,496	1,049,329
Inventories	2,424,178	2,142,561
Prepaid expenses and other current assets	691,835	1,867,803
Total current assets	11,339,424	9,103,374
Fixed assets, net	430,669	440,842
Other long-term assets	38,127	55,008
Total assets	11,808,220	9,599,224
Current liabilities:
Accounts payable	799,785	733,305
Accrued expenses and compensation	1,974,210	2,362,124
Accrued Sales Return provisions	1,312,618	666,375
Deferred revenue	0	820,031
Total current liabilities	4,086,613	4,581,835
Total liabilities	4,086,613	4,581,835
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.0001 par value; 100,000,000 shares authorized at June 30, 2018 and December 31, 2017; 7,356,731 and 2,706,066 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	736	271
Additional paid-in capital	197,020,869	196,355,142
Accumulated deficit	(189,300,016)	(191,338,054)
Total stockholders’ equity	7,721,607	5,017,389
Total liabilities and stockholders’ equity	11,808,220	9,599,224
Non-Convertible Preferred Stock
Stockholders’ equity:
Preferred stock	0	0
Convertible preferred stock
Stockholders’ equity:
Preferred stock	$ 18	$ 30