CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 82,936	$ 50,224
Restricted cash	1,012	1,732
Short-term investments	36	44
Accounts receivable - trade, net of allowance of $33 and $31, respectively	59,850	49,766
Inventories	75,768	51,817
Prepaid income tax	1,394
Prepaid expenses and other current assets	8,701	3,969
Total current assets	229,697	157,552
Cash restricted for construction in progress		8
Property, plant and equipment, net	197,943	144,098
Land use rights, net	804	778
Intangible assets, net	4,007	3,993
Deferred income tax assets	12,801	11,421
Other assets, net	7,732	4,468
TOTAL ASSETS	452,984	322,318
Current liabilities
Current portion of notes payable and long-term debt	559	7,865
Accounts payable	43,624	36,375
Bank acceptance payable		307
Accrued income taxes	7,422	974
Accrued liabilities	19,103	14,452
Total current liabilities	70,708	59,973
Notes payable and long-term debt, less current portion	49,000	34,961
TOTAL LIABILITIES	119,708	94,934
Stockholders' equity:
Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at December 31, 2017 and December 31, 2016, respectively
Common Stock; 45,000 shares authorized at $0.001 par value; 19,451 and 18,400 shares issued and outstanding at December 31, 2017 and December 31, 2016, respectively	19	18
Additional Paid in Capital	285,376	265,264
Accumulated other comprehensive gain (loss)	9,743	(885)
Retained earnings (accumulated deficit)	38,138	(37,013)
TOTAL STOCKHOLDERS' EQUITY	333,276	227,384
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 452,984	$ 322,318