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BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Current Assets: |  |
Cash and cash equivalents | $ 16,469 | $ 34,975
Short-term investments (certificates of deposit) | 17,604 | 26,002
Interest receivable on short-term investments (certificates of deposit) | 37 | 106
Prepaid expenses | 1,015 | 278
Total current assets | 35,125 | 61,361
Property, plant and equipment, net | 6,465 | 140
Fixed assets - construction in process | 393 | 1,241
Restricted cash | 500 | 500
Other assets | 271 | 251
Total Assets | 42,754 | 63,493
Current Liabilities: |  |
Accounts payable and accrued expenses | 5,381 | 3,474
Payables and accrued expenses - related party | 236 | 137
Total current liabilities | 5,617 | 3,611
Deferred Rent Payable | 741 | 50
Total Liabilities | 6,358 | 3,661
Commitments and Contingencies |  |
Stockholders' Equity |  |
Preferred stock ($0.0001 par value), 2,000,000 shares authorized, 250,000 shares of Class A preferred stock issued and outstanding as of December 31, 2018 and December 31, 2017 | 0 | 0
Common Stock, Value, Issued | 3 | 3
Common stock issuable,709,314 and 834,756 shares as of December 31, 2018 and December 31, 2017, respectively | 2,085 | 9,558
Additional paid-in capital | 113,378 | 98,679
Accumulated deficit | (79,070) | (48,408)
Total Stockholders' Equity | 36,396 | 59,832
Total Liabilities and Stockholders' Equity | 42,754 | 63,493
Common Class A [Member] |  |
Stockholders' Equity |  |
Common Stock, Value, Issued | 0 | 0
Total Stockholders' Equity | $ 0 | $ 0

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