Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 55,908	$ 59,977
Restricted cash	6,609	7,051
Accounts receivable - trade, net of allowance of $65 and $30, respectively	25,783	34,655
Inventories	87,109	85,028
Prepaid income tax	375	224
Prepaid expenses and other current assets	6,904	5,869
Total current assets	182,688	192,804
Property, plant and equipment, net	243,717	248,444
Land use rights, net	5,481	5,598
Operating right of use asset	7,645	7,768
Financing right of use asset	111	119
Intangible assets, net	4,051	4,081
Deferred income tax assets	9,078	7,287
Other assets, net	765	724
TOTAL ASSETS	453,536	466,825
Current liabilities
Current portion of notes payable and long-term debt	38,096	33,371
Accounts payable	36,236	32,828
Bank acceptance payable	9,550	6,310
Current lease liability - operating	938	965
Current lease liability - financing	17	17
Accrued liabilities	10,677	17,864
Total current liabilities	95,514	91,355
Notes payable and long-term debt, less current portion	15,315	16,552
Convertible senior notes	77,235	77,041
Non-current lease liability - operating	7,878	7,983
Non-current lease liability - financing	95	100
TOTAL LIABILITIES	196,037	193,031
Stockholders' equity:
Preferred Stock; 5,000 shares authorized at $0.001 par value; no shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	0	0
Common Stock; 45,000 shares authorized at $0.001 par value; 20,249 and 24,140 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	20	20
Additional paid-in capital	306,305	303,401
Accumulated other comprehensive (loss) and income	(1,972)	430
Accumulated deficit	(46,854)	(30,057)
TOTAL STOCKHOLDERS' EQUITY	257,499	273,794
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 453,536	$ 466,825