Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 4,800,993	$ 8,190,302
Accounts receivable, net	2,675,486	2,425,417
Inventories	4,210,683	3,931,007
Other current assets	556,787	510,710
Total current assets	12,243,949	15,057,436
Property and equipment:
Leasehold improvements	139,970	139,970
Equipment at customers	3,575,141	3,365,636
Machinery and equipment	5,786,757	5,597,385
Property and equipment, gross	9,501,868	9,102,991
Accumulated depreciation and amortization	(7,217,383)	(6,849,543)
Property and equipment, net	2,284,485	2,253,448
Intangible and other assets, net	1,539,358	851,737
Total assets	16,067,792	18,162,621
Current liabilities:
Accounts payable	1,543,786	1,594,147
Accrued expenses	1,529,684	1,737,312
Note payable	63,622
Current portion of long-term debt	608,109	994,898
Total current liabilities	3,745,201	4,326,357
Deferred gain on sale and leaseback of property	394,537	495,515
Long-term debt, less current portion	6,891,891	3,915,949
Other long-term liabilities	300,000
Total liabilities	11,331,629	8,737,821
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock, $.004 par value per share, 40,000,000 shares authorized, 19,567,140 and 19,324,549 shares issued at September 30, 2014 and December 31, 2013, respectively, including shares held in treasury	78,269	77,298
Common Stock held in treasury, at cost - 86,000 shares	(101,480)	(101,480)
Additional paid-in capital	20,060,756	18,939,869
Accumulated deficit	(29,239,022)	(23,428,527)
Total stockholders' equity	4,736,163	9,424,800
Total liabilities and stockholders' equity	16,067,792	18,162,621
Series A Convertible Preferred Stock [Member]
Stockholders' equity:
Preferred stock	8,802,000	8,802,000
Series A Exchangeable Preferred Stock [Member]
Stockholders' equity:
Preferred stock	$ 5,135,640	$ 5,135,640