Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Current assets    
Cash and cash equivalents $ 14,311 $ 12,921
Accounts receivable, net of allowance of $7 and $15, respectively 975 1,496
Prepaid expenses and other current assets 1,401 1,763
Total current assets 16,687 16,180
Restricted cash 210 500
Property and equipment, net 3,142 2,387
Other assets 145 362
Total assets 20,184 19,429
Current liabilities    
Accounts payable 1,100 823
Accrued expenses and other current liabilities 6,171 4,293
Accrued restructuring charges, current portion 44 221
Total current liabilities 7,315 5,337
Other long-term liabilities 586 592
Total liabilities 7,901 5,929
Commitments and contingencies (Note 6)      
Stockholders' equity    
Common stock: $0.001 par value; 100,000 shares authorized: 25,263 and 24,303 shares issued and 21,647 and 20,692 outstanding, respectively 25 24
Additional paid-in capital 163,680 159,430
Accumulated deficit (133,770) (128,334)
Treasury stock, at cost: 3,615 and 3,610 shares, respectively (17,652) (17,620)
Total stockholders' equity 12,283 13,500
Total liabilities and stockholders' equity $ 20,184 $ 19,429