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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Current assets    
Cash and cash equivalents $ 352 $ 2,516
Restricted cash 1,062 1,062
Accounts receivables, net 180 585
Inventories 687 858
Prepaid expenses and other current assets 664 898
Total current assets 2,945 5,919
Property, plant and equipment, net 805 925
Right-of-use assets 1,886  
Total assets 5,636 6,844
Current liabilities    
Accounts payable 10,713 7,715
Accrued expenses 9,119 7,964
Notes payable, net of debt discount 9,838  
Convertible notes payable, net of debt discount 523 2,038
Lease liabilities, current portion 1,050  
Warrant liability 9 33
Total current liabilities 31,252 17,750
Deferred revenue 3,143 3,405
Lease liabilities, long-term portion 848  
Other non-current liabilities 122 628
Total liabilities 35,365 21,783
Commitments and contingencies
Stockholders' deficit    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares and 101 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively 0 0
Common stock, $.01 par value; 1,000,000,000 shares authorized; 18,277,807 and 10,299,954 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively* [1] 183 103
Additional paid-in capital 328,018 328,962
Accumulated deficit (357,907) (344,054)
Accumulated other comprehensive income (23) 50
Total stockholders' deficit (29,729) (14,939)
Total liabilities and stockholders' deficit $ 5,636 $ 6,844
[1] reflects a one-for-five hundred (1:500) reverse stock split effected on May 2, 2018.