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CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Current assets:    
Cash and cash equivalents $ 43,232 $ 39,949
Accounts receivable, net 5,073 4,968
Inventories 1,413 1,863
Prepaid expenses and other current assets 240 235
Total current assets 49,958 47,015
Property and equipment, net 6,212 6,360
Other assets, net 17 25
Total assets 56,187 53,400
Current liabilities:    
Accounts payable 651 565
Accrued expenses 126 118
Accrued compensation 841 1,143
Accrued professional 278 427
Deferred revenue 1,208 944
Total current liabilities 3,104 3,197
Long-term deferred revenue 462 320
Stockholders' equity:    
Preferred stock, $1.00 par value; 1,000,000 shares authorized, none outstanding    
Common stock, $.01 par value; 70,000,000 shares authorized; issued and outstanding 20,767,661 as of June 30, 2011 and 20,041,863 as of December 31, 2010 208 200
Additional paid-in capital 79,780 77,373
Accumulated deficit (27,367) (27,690)
Total stockholders' equity 52,621 49,883
Total liabilities and stockholders' equity $ 56,187 $ 53,400