Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Current Period Unaudited)

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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 28,772 $ 22,793
Accounts receivable 861 882
Inventory 1,089 1,239
Prepaid expenses and other current assets 322 770
Total current assets 31,044 25,684
Non-current assets    
Property and equipment, net 46,411 45,733
Intellectual property, net 1,318 1,461
Other assets 1,574 1,564
Total non-current assets 49,303 48,758
Total assets 80,347 74,442
Current liabilities    
Accounts payable 1,874 1,436
Accrued expenses 2,020 1,801
Deferred rent, current portion 203 192
Notes payable, current portion 323 405
Convertible note payable, current portion 3,029
Total current liabilities 7,449 3,834
Deferred rent, non-current portion 644 771
Asset retirement obligation 733 701
Notes payable, non-current portion 8,669 8,839
Convertible note payable, non-current portion 1,332
Total liabilities 17,495 15,477
Commitments and contingencies
Stockholders' equity    
Common stock; $0.001 par value; 50,000,000 shares authorized; 38,779,710 and 27,554,076 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively 39 27
Additional paid-in capital 144,377 113,780
Accumulated deficit (81,564) (54,842)
Total stockholders' equity 62,852 58,965
Total liabilities and stockholders' equity $ 80,347 $ 74,442