Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net loss	$ (3,232,400)	$ (4,095,255)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	61,579	61,638
Stock-based compensation	66,496	66,012
Change in fair value of warrant liability	(77,601)	(94,316)
Changes in operating assets and liabilities:
Accounts receivable	(211,240)	251,455
Inventories	55,379	(424,238)
Prepaid expenses and other current and long-term assets	236,859	142,887
Accounts payable	(329,980)	379,509
Accrued expenses and compensation	(40,034)	317,732
Deferred revenue	116,968	(223,349)
Net cash used in operating activities	(3,353,974)	(3,617,925)
Cash flows from investing activities:
Purchases of fixed assets	0	(28,643)
Net cash used in investing activities	0	(28,643)
Cash flows from financing activities:
Net proceeds from issuance of stock and warrants	6,302,000	(76,653)
Net cash provided by financing activities	6,302,000	(76,653)
Net increase/(decrease) in cash and cash equivalents	2,948,026	(3,723,221)
Cash and cash equivalents, beginning of period	3,949,135	12,462,872
Cash and cash equivalents, end of period	6,897,161	8,739,651
Supplemental disclosure of cash flow information:
Common stock issued to settle employee incentive compensation obligation	$ 0	$ 318,761