CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 29,698,000	$ 44,352,000
Short-term investments	18,802,000	20,032,000
Accounts receivable, net of allowances of $358 and $527 as of June 30, 2018 and December 31, 2017	22,516,000	22,778,000
Inventories	57,038,000	45,840,000
Prepaid expenses and other current assets	9,416,000	7,519,000
Total current assets	137,470,000	140,521,000
Long-term investments	5,714,000	12,576,000
Property, plant and equipment, net	65,174,000	46,530,000
Other assets	11,323,000	11,573,000
Total assets	219,681,000	211,200,000
Current liabilities:
Accounts payable	14,059,000	11,445,000
Accrued liabilities	11,793,000	11,149,000
Total current liabilities	25,852,000	22,594,000
Other long-term liabilities	296,000	289,000
Total liabilities	26,148,000	22,883,000
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, 2018 and December 31, 2017 (Liquidation preference of $6,904 and $6,819 as of June 30, 2018 and December 31, 2017)	3,532,000	3,532,000
Common stock, $0.001 par value; 70,000 shares authorized; 39,511 and 39,413 shares issued and outstanding as of June 30, 2018 and December 31, 2017	39,000	39,000
Additional paid-in capital	232,984,000	231,679,000
Accumulated deficit	(48,061,000)	(54,837,000)
Accumulated other comprehensive income	1,172,000	3,407,000
Total AXT, Inc. stockholders' equity	189,666,000	183,820,000
Noncontrolling interests	3,867,000	4,497,000
Total stockholders' equity	193,533,000	188,317,000
Total liabilities and stockholders' equity	$ 219,681,000	$ 211,200,000

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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
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.