CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 72,602,000	$ 26,892,000
Short-term investments	240,000	9,427,000
Accounts receivable, net of allowances of $217 and $34 as of December 31, 2020 and December 31, 2019	24,558,000	19,031,000
Inventories	51,515,000	49,152,000
Prepaid expenses and other current assets	15,603,000	8,703,000
Total current assets	164,518,000	113,205,000
Long-term investments	5,726,000
Property, plant and equipment, net	115,825,000	97,403,000
Operating lease right-of-use assets	2,683,000	2,938,000
Other assets	10,110,000	9,803,000
Total assets	298,862,000	223,349,000
Current liabilities:
Accounts payable	12,669,000	10,098,000
Accrued liabilities	15,995,000	11,681,000
Bank loan	10,411,000	5,747,000
Total current liabilities	39,075,000	27,526,000
Noncurrent operating lease liabilities	2,374,000	2,695,000
Other long-term liabilities	1,881,000	366,000
Total liabilities	43,330,000	30,587,000
Commitments and contingencies (Note 16)
Redeemable noncontrolling interests (Note 18)	47,563,000
Stockholders' equity:
Preferred stock Series A, $0.001 par value; 2,000 shares authorized; 883 shares issued and outstanding as of December 31, 2020 and December 31, 2019 (Liquidation preference of $7,346 and $7,169 as of December 31, 2020 and December 31, 2019)	3,532,000	3,532,000
Common stock, $0.001 par value; 70,000 shares authorized; 41,967 and 40,632 shares issued and outstanding as of December 31, 2020 and December 31, 2019	42,000	41,000
Additional paid-in capital	230,381,000	236,957,000
Accumulated deficit	(44,545,000)	(47,783,000)
Accumulated other comprehensive income (loss)	3,209,000	(4,862,000)
Total AXT, Inc. stockholders' equity	192,619,000	187,885,000
Noncontrolling interests	15,350,000	4,877,000
Total stockholders' equity	207,969,000	192,762,000
Total liabilities, redeemable noncontrolling interests and stockholders' equity	$ 298,862,000	$ 223,349,000