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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 2,516 $ 3,999
Restricted cash 1,062 1,325
Accounts receivables, net 585 317
Inventories 858 1,248
Prepaid expenses and other current assets 898 700
Total current assets 5,919 7,589
Property, plant and equipment, net 925 1,298
Total assets 6,844 8,887
Current liabilities    
Accounts payable 7,715 3,846
Accrued expenses 7,964 3,408
Convertible notes payable, net of debt discount 2,038 0
Warrant liability 33 560
Total current liabilities 17,750 7,814
Deferred revenue 3,405 0
Other non-current liabilities 628 395
Total liabilities 21,783 8,209
Commitments and contingencies
Stockholders' Equity (Deficit)    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 101 and 0 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively 0 0
Common stock, $.01 par value; 1,000,000,000 shares authorized; 10,299,954 and 228,140 shares issued and 10,229,954 and 228,139 shares outstanding at December 31, 2018 and December 31, 2017, respectively* [1] 103 2
Additional paid-in capital 328,962 325,517
Accumulated deficit (344,054) (324,832)
Treasury stock, at cost; 0 and 1 share at December 31, 2018 and December 31, 2017, respectively* [1] 0 (51)
Accumulated other comprehensive loss 50 42
Total stockholders' equity (deficit) (14,939) 678
Total liabilities and stockholders' equity (deficit) $ 6,844 $ 8,887
[1] reflects a one-for-three hundred and fifty (1:350) reverse stock split effected on November 6, 2017 and a one-for-five hundred (1:500) reverse stock split effected on May 2, 2018.