Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 7,567	$ 7,571
Investments	8,267	5,745
Accounts receivable, net	4,977	5,576
Inventories, net	2,814	2,760
Prepaid expenses and other current assets	931	1,008
Total current assets	24,556	22,660
Long-term investments	761	1,000
Equipment, furniture and leasehold improvements, net	6,904	5,980
Other assets	125	127
Deferred tax asset	8,165	8,165
Total assets	40,511	37,932
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	888	961
Accrued expenses	2,462	2,246
Other current liabilities	739	614
Total current liabilities	4,089	3,821
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock, $.001 par value: authorized 10,000,000 shares: Series B Convertible Preferred stock, (liquidation preference of $5,659,000) stated value $1,000 per share, $.001 par value: 10,000 shares designated and 5,659 issued and outstanding as of September 30, 2012 and December 31, 2011
Common stock, $.001 par value: authorized 200,000,000 shares, issued and outstanding, 23,674,541 shares as of September 30, 2012 and 23,513,978 as of December 31, 2011	24	24
Additional paid in capital	223,052	220,838
Accumulated deficit	(186,191)	(186,656)
Treasury stock, 150,000 shares as of September 30, 2012 and 25,000 shares as of December 31, 2011	(463)	(95)
Total shareholders' equity	36,422	34,111
Total liabilities and shareholders' equity	$ 40,511	$ 37,932