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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 10,899 $ 10,002
Restricted cash 181 181
Accounts receivables, net 103 21
Inventories 839 654
Prepaid expenses and other current assets 1,860 1,759
Total current assets 13,882 12,617
Property, plant and equipment, net 1,318 735
Deferred offering costs 268  
Right-of-use assets 1,097 860
Total assets 16,565 14,212
Current liabilities    
Accounts payable 1,502 4,533
Accrued expenses 6,085 6,947
Deferred revenue, current 501 482
Lease liabilities, current 556 664
Convertible notes payable, current 2,000  
Warrant liability   3,368
Total current liabilities 10,644 15,994
Deferred revenue, non-current 2,103 2,378
Lease liabilities, non-current 542 197
Convertible notes payable, non-current   2,000
Total liabilities 13,289 20,569
Commitments and contingencies (Note 13)
Stockholders' equity (deficit)    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 21,473 and 41,517 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively 0 0
Common stock, $.01 par value; 1,000,000,000 shares authorized; 4,035,558 and 67,091 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively* 40 1
Additional paid-in capital 391,545 364,785
Accumulated deficit (388,298) (371,171)
Accumulated other comprehensive income (11) 28
Total stockholders' equity (deficit) 3,276 (6,357)
Total liabilities and stockholders' equity (deficit) $ 16,565 $ 14,212