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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 26,515 | $ 26,892
Short-term investments | 5,247 | 9,427
Accounts receivable, net of allowances of $77 and $34 as of June 30, 2020 and December 31, 2019 | 19,760 | 19,031
Inventories | 49,586 | 49,152
Prepaid expenses and other current assets | 9,621 | 8,703
Total current assets | 110,729 | 113,205
Long-term investments | 720 |
Property, plant and equipment, net | 101,031 | 97,403
Operating lease right-of-use assets | 2,722 | 2,938
Other assets | 11,018 | 9,803
Total assets | 226,220 | 223,349
Current liabilities: |  |
Accounts payable | 11,540 | 10,098
Accrued liabilities | 10,511 | 11,681
Bank loan | 6,087 | 5,747
Total current liabilities | 28,138 | 27,526
Long-term portion of royalty payments | 1,177 |
Noncurrent operating lease liabilities | 2,455 | 2,695
Other long-term liabilities | 396 | 366
Total liabilities | 32,166 | 30,587
Commitments and contingencies (Note 12) |  |
Stockholders' equity: |  |
Preferred stock Series A, $0.001 par value; 2,000 shares authorized; 883 shares issued and outstanding as of June 30, 2020 and December 31, 2019 (Liquidation preference of $7,257 and $7,169 as of June 30, 2020 and December 31, 2019) | 3,532 | 3,532
Common stock, $0.001 par value; 70,000 shares authorized; 40,889 and 40,632 shares issued and outstanding as of June 30, 2020 and December 31, 2019 | 41 | 41
Additional paid-in capital | 238,754 | 236,957
Accumulated deficit | (47,600) | (47,783)
Accumulated other comprehensive loss | (6,365) | (4,862)
Total AXT, Inc. stockholders' equity | 188,362 | 187,885
Noncontrolling interests | 5,692 | 4,877
Total stockholders' equity | 194,054 | 192,762
Total liabilities and stockholders' equity | $ 226,220 | $ 223,349

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