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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Current assets    
Cash and cash equivalents $ 6,170 $ 7,104
Short-term investments 650  
Accounts receivable 893 1,622
Inventories 1,215 1,148
Prepaid expenses and other 596 923
Total current assets 9,524 10,797
Property and equipment, net 193 279
Goodwill 0 420
Right-of-use lease asset 203  
Other 139 260
Total assets 10,059 11,756
Current liabilities    
Accounts payable 131 236
Deferred revenue 146 273
Short-term lease liability 197  
Accrued expenses and other 1,249 1,402
Total current liabilities 1,723 1,911
Long-term liabilities 19 17
Convertible notes payable 2,858 2,671
Total liabilities 4,600 4,599
Commitments and contingencies (Note 4)
Stockholders’ equity    
Preferred stock, $0.01 par value; 20,000 shares authorized; none issued and outstanding
Common stock, $0.001 par value; 120,000 shares authorized; 2,178 shares and 2,148 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively 2 2
Additional paid-in capital 243,217 243,022
Accumulated other comprehensive income 1  
Accumulated deficit (237,761) (235,867)
Total stockholders’ equity 5,459 7,157
Total liabilities and stockholders’ equity $ 10,059 $ 11,756