Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 9,890,223	$ 11,387,300
Short-term investments	1,253,189	2,490,587
Accounts receivable, net of allowance	3,422,413	2,535,331
Inventories	3,402,944	3,276,568
Other current assets	435,205	299,620
Total current assets	18,403,974	19,989,406
Property and equipment:
Leasehold improvements	311,320	304,396
Equipment at customers	3,341,339	2,374,302
Machinery and equipment	5,361,764	5,034,300
Property and equipment, gross	9,014,423	7,712,998
Accumulated depreciation and amortization	(6,241,424)	(5,583,358)
Property and equipment, net	2,772,999	2,129,640
Intangible and other assets, net	820,277	704,648
Total assets	21,997,250	22,823,694
Current liabilities:
Accounts payable	1,547,286	1,340,488
Accrued expenses	1,420,274	1,443,367
Current portion bank term debt payable	277,221
Total current liabilities	3,244,781	2,783,855
Deferred gain on sale and leaseback of property	663,811	764,789
Income taxes payable	211,159	211,159
Long-term debt, less current portion	3,088,697
Total liabilities	7,208,448	3,759,803
Stockholders' equity:
Common stock, $.004 par value per share, 40,000,000 shares authorized, 13,739,996 and 13,701,273 shares issued at June 30, 2012 and December 31, 2011, respectively, including shares held in treasury	55,069	54,805
Common stock held in treasury, at cost - 86,000 shares	(101,480)	(101,480)
Additional paid-in capital	11,816,027	10,930,927
Accumulated deficit	(10,918,454)	(5,758,001)
Total stockholders' equity	14,788,802	19,063,891
Total liabilities and stockholders' equity	21,997,250	22,823,694
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