CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (9,573,059)	$ (13,097,023)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	863,353	1,107,955
Stock-based compensation	1,770,897	1,687,523
Provision for uncollectible accounts	89,462	734,243
Provision for sales returns	(179,000)	(276,000)
Provision for inventory reserves	436,000	295,000
Provision for deferred income taxes	0	4,039,723
Loss on abandonment of assets	0	10,523
Gain on sale of long-term assets	(125)	0
Changes in assets and liabilities:
Accounts receivable	1,747,140	4,276,236
Inventory	6,174,209	3,178,473
Prepaid expenses and other assets, net	(104,821)	116,459
Accounts payable	177,062	(384,465)
Accrued cooperative advertising	(162,000)	32,000
Accrued income taxes	12,821	12,240
Accrued expenses and other liabilities	315,954	302,110
Net cash provided by operating activities	1,567,893	2,034,997
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(428,128)	(545,543)
Patent, license rights, and trademark costs	(45,742)	(55,518)
Proceeds from sale of assets	175	0
Net cash used in investing activities	(473,695)	(601,061)
CASH FLOWS FROM FINANCING ACTIVITIES:
Stock option exercises	172,766	0
Net cash provided by financing activities	172,766	0
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,266,964	1,433,936
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	4,007,341	2,573,405
CASH AND CASH EQUIVALENTS, END OF PERIOD	5,274,305	4,007,341
Supplemental disclosure of cash flow information:
Cash paid during the year for interest	10,359	901
Cash paid during the year for income taxes	0	0
Non-cash investing activities:
Tenant improvement allowance received under operating lease	$ 0	$ 550,160