Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (unaudited)

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Condensed Consolidated Balance Sheets (unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 17,497 $ 22,793
Accounts receivable 1,327 882
Inventory 933 1,239
Prepaid expenses and other current assets 638 770
Total current assets 20,395 25,684
Non-current assets    
Property and equipment, net 46,583 45,733
Intellectual property, net 1,414 1,461
Other assets 1,564 1,564
Total non-current assets 49,561 48,758
Total assets 69,956 74,442
Current liabilities    
Accounts payable 2,084 1,436
Accrued expenses 1,671 1,801
Deferred rent, current portion 196 192
Notes payable, current portion 382 405
Total current liabilities 4,333 3,834
Deferred rent, non-current portion 722 771
Asset retirement obligation 712 701
Notes payable, non-current portion 8,763 8,839
Convertible note payable, non-current portion 1,742 1,332
Total liabilities 16,272 15,477
Commitments and contingencies  
Stockholders' equity    
Common stock; $0.001 par value; 50,000,000 shares authorized; 28,694,210 and 27,554,076 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively 29 27
Additional paid-in capital 116,029 113,780
Accumulated deficit (62,374) (54,842)
Total stockholders' equity 53,684 58,965
Total liabilities and stockholders' equity $ 69,956 $ 74,442