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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 7,375 $ 6,053
Short-term investments   300
Accounts receivable 601 1,175
Inventories 1,016 968
Prepaid expenses and other 311 472
Total current assets 9,303 8,968
Property and equipment, net 127 197
Right-of-use lease asset, net 63 156
Other 18 78
Total assets 9,511 9,399
Current liabilities    
Accounts payable 48 218
Deferred revenue   166
Short-term lease liability 66 166
PPP note payable, current 195  
Accrued expenses and other 1,302 1,155
Total current liabilities 1,611 1,705
Convertible notes payable 2,970 2,858
PPP note payable 384  
Total liabilities 4,965 4,563
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; 3,534 shares and 2,179 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively 3 2
Additional paid-in capital 245,426 243,281
Accumulated deficit (240,883) (238,447)
Total stockholders’ equity 4,546 4,836
Total liabilities and stockholders’ equity $ 9,511 $ 9,399