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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 28,575 $ 10,002
Restricted cash 181 181
Accounts receivables, net 57 21
Inventories 855 654
Prepaid expenses and other current assets 2,670 1,759
Total current assets 32,338 12,617
Property, plant and equipment, net 1,351 735
Right-of-use assets 946 860
Total assets 34,635 14,212
Current liabilities    
Accounts payable 1,774 4,533
Accrued expenses 5,241 6,947
Deferred revenue, current 525 482
Lease liabilities, current 495 664
Convertible notes payable, current 2,000 0
Warrant liability 0 3,368
Total current liabilities 10,035 15,994
Deferred revenue, non-current 2,072 2,378
Lease liabilities, non-current 450 197
Convertible notes payable, non-current 0 2,000
Total liabilities 12,557 20,569
Commitments and contingencies (Note 13)
Stockholders' Equity (Deficit)    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 20,631 and 41,517 shares issued and outstanding at December 31, 2020 and December 31, 2019, respectively 0 0
Common stock, $.01 par value; 40,000,000 and 1,000,000,000 shares authorized; 5,996,101 and 67,091 shares issued and outstanding at December 31, 2020 and December 31, 2019, respectively* [1] 60 1
Additional paid-in capital 417,449 364,785
Accumulated deficit (395,327) (371,171)
Accumulated other comprehensive (loss) income (104) 28
Total stockholders' equity (deficit) 22,078 (6,357)
Total liabilities and stockholders' equity (deficit) $ 34,635 $ 14,212
[1] reflects, a one-for-seven hundred (1:700) reverse stock split effected on December 24, 2019.