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
Jun. 30, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 36,759 $ 22,793
Accounts receivable 360 882
Inventory 1,247 1,239
Prepaid expenses and other current assets 218 770
Total current assets 38,584 25,684
Non-current assets    
Property and equipment, net 46,492 45,733
Intellectual property, net 1,366 1,461
Other assets 1,564 1,564
Total non-current assets 49,422 48,758
Total assets 88,006 74,442
Current liabilities    
Accounts payable 1,692 1,436
Accrued expenses 1,634 1,801
Deferred rent, current portion 200 192
Notes payable, current portion 347 405
Convertible note payable, current portion 2,286
Total current liabilities 6,159 3,834
Deferred rent, non-current portion 671 771
Asset retirement obligation 722 701
Notes payable, non-current portion 8,700 8,839
Convertible note payable, non-current portion 1,332
Total liabilities 16,252 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 June 30, 2018 and December 31, 2017, respectively 39 27
Additional paid-in capital 144,016 113,780
Accumulated deficit (72,301) (54,842)
Total stockholders' equity 71,754 58,965
Total liabilities and stockholders' equity $ 88,006 $ 74,442