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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Current assets    
Cash and cash equivalents $ 6,053 $ 7,104
Short-term investments 300  
Accounts receivable 1,175 1,622
Inventories 968 1,148
Prepaid expenses and other 472 923
Total current assets 8,968 10,797
Property and equipment, net 197 279
Goodwill   420
Right-of-use lease asset 156  
Other 78 260
Total assets 9,399 11,756
Current liabilities    
Accounts payable 218 236
Deferred revenue 166 273
Short-term lease liability 166  
Accrued expenses and other 1,155 1,402
Total current liabilities 1,705 1,911
Long-term liabilities   17
Convertible notes payable 2,858 2,671
Total liabilities 4,563 4,599
Commitments and contingencies (Note 9)
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; 2,179 shares and 2,148 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively 2 2
Additional paid-in capital 243,281 243,022
Accumulated deficit (238,447) (235,867)
Total stockholders’ equity 4,836 7,157
Total liabilities and stockholders’ equity $ 9,399 $ 11,756