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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Current assets    
Cash and cash equivalents $ 10,002 $ 2,516
Restricted cash 181 1,062
Accounts receivables, net 21 585
Inventories 654 858
Prepaid expenses and other current assets 1,759 898
Total current assets 12,617 5,919
Property, plant and equipment, net 735 925
Right-of-use assets 860 0
Total assets 14,212 6,844
Current liabilities    
Accounts payable 4,533 7,715
Accrued expenses 6,947 7,964
Convertible notes payable, net of debt discount 0 2,038
Lease liabilities, current portion 664 0
Warrant liability 3,368 33
Total current liabilities 15,512 17,750
Deferred revenue 2,860 3,405
Lease liabilities, long-term portion 197 0
Convertible notes payable, net of debt discount 2,000 0
Other non-current liabilities 0 628
Total liabilities 20,569 21,783
Commitments and contingencies
Stockholders' Deficit    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 41,517 and 101 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively 0 0
Common stock, $.01 par value; 1,000,000,000 shares authorized; 67,091 and 14,715 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively* [1] 1 0
Additional paid-in capital 364,785 329,065
Accumulated deficit (371,171) (344,054)
Accumulated other comprehensive loss 28 50
Total stockholders' deficit (6,357) (14,939)
Total liabilities and stockholders' deficit $ 14,212 $ 6,844
[1] reflects, a one-for-five hundred (1:500) reverse stock split effected on May 2, 2018, and a one-for-seven hundred (1:700) reverse stock split effected on December 24, 2019.