CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 50,224	$ 28,074
Restricted cash	1,732	4,719
Short-term investments	44	7,886
Accounts receivable - trade, net of allowance of $31 and $51, respectively	49,766	38,775
Inventories	51,817	66,238
Prepaid expenses and other current assets	3,969	8,236
Total current assets	157,552	153,928
Cash restricted for construction in progress	8
Property, plant and equipment, net of accumulated depreciation of $49,174 and $37,980, respectively	144,098	109,699
Land use rights, net	778	854
Intangible assets, net	3,993	3,900
Deferred income tax assets	11,421
Other assets, net	4,468	5,094
TOTAL ASSETS	322,318	273,475
Current liabilities
Current portion of notes payable and long-term debt	7,865	30,908
Accounts payable	36,375	28,668
Bank acceptance payable	307	2,998
Accrued liabilities	15,426	11,506
Total current liabilities	59,973	74,080
Notes payable and long-term debt, less current portion	34,961	33,997
TOTAL LIABILITIES	94,934	108,077
Stockholders' equity:
Common Stock; 45,000 shares authorized at $0.001 par value; 18,400 and 16,839 shares issued and outstanding at December 31, 2016 and 2015 respectively	18	17
Additional Paid in Capital	265,264	233,336
Accumulated other comprehensive gain	(885)	292
Accumulated deficit	(37,013)	(68,247)
TOTAL STOCKHOLDERS' EQUITY	227,384	165,398
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 322,318	$ 273,475

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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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.