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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 4,540 $ 10,002
Restricted cash 181 181
Accounts receivables, net 69 21
Inventories 790 654
Prepaid expenses and other current assets 2,642 1,759
Total current assets 8,222 12,617
Property, plant and equipment, net 867 735
Right-of-use assets 688 860
Total assets 9,777 14,212
Current liabilities    
Accounts payable 4,997 4,533
Accrued expenses 7,424 6,947
Lease liabilities, current portion 622 664
Warrant liability   3,368
Total current liabilities 13,043 15,512
Deferred revenue 2,672 2,860
Lease liabilities, long-term portion 67 197
Convertible notes payable, long-term 2,000 2,000
Total liabilities 17,782 20,569
Commitments and contingencies
Stockholders' deficit    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 41,447 and 41,517 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively 0 0
Common stock, $.01 par value; 1,000,000,000 shares authorized; 72,773 and 67,091 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively* [1] 1 1
Additional paid-in capital 370,933 364,785
Accumulated deficit (379,032) (371,171)
Accumulated other comprehensive income 93 28
Total stockholders' deficit (8,005) (6,357)
Total liabilities and stockholders' deficit $ 9,777 $ 14,212
[1] * reflects, a one-for-seven hundred (1:700) reverse stock split effected on December 24, 2019.