Balance Sheet (Unaudited) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 5,382,000 $ 3,961,000
Short-term investments available-for-sale 18,471,000 22,630,000
Accounts receivable 1,320,000 2,276,000
Inventories 2,678,000 2,319,000
Other current assets 741,000 993,000
Total current assets 28,592,000 32,179,000
Long-term investments available-for-sale 1,249,000 2,147,000
Property and equipment, net 3,749,000 3,835,000
Total assets 33,590,000 38,161,000
Current liabilities:    
Accounts payable, accrued expenses and other current liabilities 3,747,000 5,903,000
Deferred rent   354,000
Leasehold incentive obligation 219,000 987,000
Deferred revenues 5,135,000 5,135,000
Total current liabilities 9,101,000 12,379,000
Deferred rent 1,028,000 516,000
Leasehold incentive obligation 1,737,000 1,152,000
Deferred revenues 347,000 556,000
Stockholders’ equity:    
Preferred stock, $.001 par value; 7,500,000 shares authorized; no shares issued or outstanding at March 31, 2015 (unaudited) and December 31, 2014 0 0
Common stock, $.001 par value; 120,000,000 shares authorized at March 31, 2015 (unaudited) and December 31, 2014; 43,727,564 and 43,370,309 shares issued and outstanding at March 31, 2015 (unaudited) and December 31, 2014, respectively. 44,000 43,000
Additional paid-in capital 280,739,000 278,362,000
Accumulated other comprehensive income (loss)   (10,000)
Accumulated deficit (259,406,000) (254,837,000)
Total stockholders’ equity 21,377,000 23,558,000
Total liabilities and stockholders’ equity $ 33,590,000 $ 38,161,000