CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 48,078	$ 36,152
Short-term investments	20,524	11,415
Accounts receivable, net of allowances of $857 and $1,013 as of September 30, 2017 and December 31, 2016	20,877	14,453
Inventories	40,768	40,152
Related party notes receivable - current	57
Prepaid expenses and other current assets	5,682	5,114
Total current assets	135,986	107,286
Long-term investments	9,685	6,156
Property, plant and equipment, net	42,255	27,805
Related party notes receivable - long-term		157
Other assets	11,696	12,842
Total assets	199,622	154,246
Current liabilities:
Accounts payable	9,499	6,691
Accrued liabilities	9,284	9,260
Total current liabilities	18,783	15,951
Long-term portion of royalty payments	144	575
Other long-term liabilities	278	330
Total liabilities	19,205	16,856
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 September 30, 2017 and December 31, 2016 (Liquidation preference of $6.8 million and $6.6 million as of September 30, 2017 and December 31, 2016)	3,532	3,532
Common stock, $0.001 par value; 70,000 shares authorized; 38,891 and 33,032 shares issued and outstanding as of September 30, 2017 and December 31, 2016	39	33
Additional paid-in-capital	228,516	194,177
Accumulated deficit	(57,971)	(64,985)
Accumulated other comprehensive income	2,275	253
Total AXT, Inc. stockholders' equity	176,391	133,010
Noncontrolling interests	4,026	4,380
Total stockholders' equity	180,417	137,390
Total liabilities and stockholders' equity	$ 199,622	$ 154,246

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.