CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 9,516,479	$ 10,085,468
Accounts receivable, net	8,062,946	4,958,255
Inventories	1,233,454	1,171,383
Investment in debt securities		1,104,635
Prepaid and other current assets	477,533	566,972
Total Current Assets	19,290,412	17,886,713
Property and Equipment, Net	605,235	394,078
Patent Rights, Net	506,026	530,123
Deposits	26,936	24,272
Total Assets	20,428,609	18,835,186
Current Liabilities
Accounts payable and accrued expenses	4,155,764	4,067,894
Product warranties	140,045	146,722
Deferred revenue, current portion	663,643	652,242
Total Current Liabilities	4,959,452	4,866,858
Revolving credit facility	4,215,633	2,214,970
Deferred Revenue, Net of Current Portion	66,687	73,083
Total Liabilities	9,241,772	7,154,911
Stockholders' Equity
Preferred stock, 5,000,000 shares authorized and none issued and outstanding
Common stock, $0.01 par value - 50,000,000 authorized; 13,601,456 issued and 13,568,002 outstanding at March 31, 2018; 13,522,168 issued and 13,488,714 outstanding at December 31, 2017	136,014	135,221
Additional paid-in capital	23,813,323	23,181,641
Treasury stock, 33,454 shares at cost, at March 31, 2018 and December 31, 2017, respectively	(133,816)	(133,816)
Accumulated deficit	(12,628,684)	(11,502,771)
Total Stockholders' Equity	11,186,837	11,680,275
Total Liabilities and Stockholders' Equity	$ 20,428,609	$ 18,835,186