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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 16,011 $ 10,002
Restricted cash 181 181
Accounts receivables, net 147 21
Inventories 723 654
Prepaid expenses and other current assets 1,992 1,759
Total current assets 19,054 12,617
Property, plant and equipment, net 864 735
Right-of-use assets 525 860
Total assets 20,443 14,212
Current liabilities    
Accounts payable 2,174 4,533
Accrued expenses 5,429 6,947
Lease liabilities, current portion 508 664
Warrant liability   3,368
Total current liabilities 8,111 15,512
Deferred revenue 2,613 2,860
Lease liabilities, long-term portion 17 197
Convertible notes payable, long-term 2,000 2,000
Total liabilities 12,741 20,569
Commitments and contingencies (Note 13)
Stockholders' equity (deficit)    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 25,950 and 41,517 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively 0 0
Common stock, $.01 par value; 1,000,000,000 shares authorized; 3,521,641 and 67,091 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively* 35 1
Additional paid-in capital 390,882 364,785
Accumulated deficit (383,307) (371,171)
Accumulated other comprehensive income 92 28
Total stockholders' equity (deficit) 7,702 (6,357)
Total liabilities and stockholders' equity (deficit) $ 20,443 $ 14,212