CONDENSED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows From Operating Activities
Net loss	$ (3,301,930)	$ (379,632)
Adjustments to reconcile net income (loss) to net cash and cash equivalents used in operating activities:
Bad debt expense	175,695	9,000
Depreciation and amortization	294,906	253,219
Provision for product warranties	174,723	97,990
Stock based compensation	303,465	625,424
Decrease (increase) in:
Accounts receivable	(2,146,942)	(1,855,143)
Inventories	(438,290)	(332,488)
Prepaid and other current assets	424,500	(516,691)
Increase (decrease) in:
Accounts payable and accrued expenses	964,837	(266,452)
Deferred revenue	(197,774)	64,755
Product warranties	(104,725)	(30,652)
Total Adjustments	(549,605)	(1,960,038)
Net Cash Used In Operating Activities	(3,851,535)	(2,339,670)
Cash Flows from Investing Activities
Acquisition of property and equipment	(240,734)	(262,437)
Investment in debt securities - held to maturity	(264,365)	(6,577,522)
Investments matured	4,816,000
Net Cash Provided By (Used In) Investing Activities	4,310,901	(6,839,959)
Cash Flows from Financing Activities
Initial public offering of units		12,650,000
Exercise of warrants		1,132,538
Revolving credit facility, net	1,625,970	(422,702)
Withholding taxes on stock compensation	(289,286)
Offering costs		(2,126,562)
Cash dividends on preferred stock		(2,511,024)
Net Cash Provided By Financing Activities	1,336,684	8,722,250
Net Increase (Decrease) in Cash and Cash Equivalents	1,796,050	(457,379)
Cash and Cash Equivalents - Beginning	5,042,477	5,065,068
Cash and Cash Equivalents - Ending	6,838,527	4,607,689
Supplemental Disclosure of Cash Flow Information
Interest Paid	43,316	18,781
Non Cash Investing and Financing Activities
Reclassification of prepaid offering costs to APIC		130,629
Transfer of inventory to property and equipment	$ 35,393	$ 67,908