CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities
Net loss	$ (2,121,018)	$ (1,125,913)
Adjustments to reconcile net loss to net cash and cash equivalents used in operating activities:
Bad debt expense (recovery)		2,345
Depreciation and amortization	128,435	100,534
Provision for product warranties	59,638	36,790
Stock based compensation	154,535	541,608
Decrease (increase) in:
Accounts receivable	(3,735,738)	(3,107,036)
Inventories	(26,299)	(62,071)
Prepaid and other current assets	(445,874)	86,775
Increase (decrease) in:
Accounts payable and accrued expenses	(1,144,269)	87,870
Deferred revenue	71,402	5,005
Product warranties	(57,913)	(43,467)
Total Adjustments	(4,996,083)	(2,351,647)
Net Cash Used In Operating Activities	(7,117,101)	(3,477,560)
Cash Flows from Investing Activities
Acquisition of property and equipment	(9,404)	(287,594)
Investment in debt securities - held to maturity	(3,007,764)
Investments matured	1,200,000	1,104,635
Net Cash Provided By (Used In) Investing Activities	(1,817,168)	817,041
Cash Flows from Financing Activities
Revolving credit facility, net		2,000,663
Exercise of warrants	2,701,897	90,867
Net Cash Provided By Financing Activities	2,701,897	2,091,530
Net Decrease in Cash and Cash Equivalents	(6,232,372)	(568,991)
Cash and Cash Equivalents - Beginning	12,484,256	10,085,468
Cash and Cash Equivalents - Ending	6,251,884	9,516,479
Supplemental Disclosure of Cash Flow Information
Interest Paid		33,415
Non Cash Investing and Financing Activities
Transfer of inventory to property and equipment	103,697
Lease liabilities arising from obtaining right-of-use-assets	$ 805,000