Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 8,637,806	$ 4,494,663
Accounts receivable, net	2,933,255	2,829,622
Inventories	1,924,988	2,226,979
Other current assets	416,442	556,760
Assets associated with discontinued operations	1,135,407	1,709,557
Total current assets	15,047,898	11,817,581
Property and equipment:
Leasehold improvements	139,970	139,970
Equipment at customers	3,794,452	3,795,659
Machinery and equipment	5,100,751	5,221,519
Property and equipment, gross	9,035,173	9,157,148
Accumulated depreciation and amortization	(6,836,862)	(7,007,704)
Property and equipment, net	2,198,311	2,149,444
Intangible and other assets, net	1,362,655	1,469,090
Total assets	18,608,864	15,436,115
Current liabilities:
Accounts payable	1,439,604	1,180,409
Accrued expenses	1,767,397	1,755,949
Notes payable	$ 60,980	86,941
Note payable - line-of-credit		1,000,000
Current portion of long-term debt	$ 2,177,415	1,216,218
Liabilities associated with discontinued operations	83,621	82,583
Total current liabilities	5,529,017	5,322,100
Deferred gain on sale and leaseback of property	259,899	360,877
Long-term debt, less current portion	5,322,585	6,283,782
Other long-term liabilities	300,000	300,000
Total liabilities	$ 11,411,501	$ 12,266,759
Commitments and contingencies
Stockholders' equity:
Common stock, $.004 par value per share, 60,000,000 shares authorized, 26,968,722 and 19,563,333 shares issued at September 30, 2015 and December 31, 2014, respectively, including shares held in treasury	$ 107,875	$ 78,253
Common stock held in treasury, at cost - 86,000 shares	(101,480)	(101,480)
Additional paid-in capital	29,391,575	20,285,008
Accumulated deficit	(36,138,247)	(31,030,065)
Total stockholders' equity	7,197,363	3,169,356
Total liabilities and stockholders' equity	18,608,864	15,436,115
Series A Convertible Preferred Stock [Member]
Stockholders' equity:
Preferred stock, $.001 par value per share, 1,000,000 shares authorized	8,802,000	8,802,000
Series A Exchangeable Preferred Stock [Member]
Stockholders' equity:
Preferred stock, $.001 par value per share, 1,000,000 shares authorized	$ 5,135,640	$ 5,135,640