Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets
Cash and cash equivalents	$ 43,534	$ 43,425
Restricted cash	5,363	6,689
Accounts receivable - trade, net of allowance of $62 and $62, respectively	43,942	43,042
Notes receivable	8,505	401
Inventories	94,507	110,397
Prepaid income tax	2	2
Prepaid expenses and other current assets	4,717	5,213
Total current assets	200,570	209,169
Property, plant and equipment, net	242,452	252,984
Land use rights, net	5,790	5,854
Operating right of use asset	7,277	7,729
Financing right of use asset	65	88
Intangible assets, net	3,877	3,999
Other assets, net	2,493	982
TOTAL ASSETS	462,524	480,805
Current liabilities
Current portion of notes payable and long-term debt	41,254	38,265
Accounts payable	28,333	29,482
Bank acceptance payable	6,481	15,860
Current lease liability - operating	1,045	1,012
Current lease liability - financing	18	18
Accrued liabilities	16,204	18,511
Total current liabilities	93,335	103,148
Notes payable and long-term debt, less current portion	19,271	13,904
Convertible senior notes	78,472	77,854
Non-current lease liability - operating	7,410	7,926
Non-current lease liability - financing	68	82
TOTAL LIABILITIES	198,556	202,914
Stockholders' equity:
Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	0	0
Common Stock; 45,000 shares authorized at $0.001 par value; 27,175 and 25,110 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	27	25
Additional paid-in capital	378,207	354,685
Accumulated other comprehensive income	13,865	11,690
Accumulated deficit	(128,131)	(88,509)
TOTAL STOCKHOLDERS' EQUITY	263,968	277,891
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 462,524	$ 480,805