Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 28,656	$ 48,138
Accounts receivable, net	71,419	84,615
Inventories	75,027	62,517
Income tax receivable	11,808	8,800
Other current assets	9,372	11,148
Total current assets	196,282	215,218
Property, plant and equipment, net	209,105	223,690
Operating lease right-of-use assets	46,443	50,264
Goodwill	0	0
Intangible assets, net	88,718	103,065
Investment in joint venture	34,045	26,983
Deferred tax assets	314	0
Other non-current assets	4,194	5,742
Total assets	579,101	624,962
Current liabilities:
Accounts payable	36,710	37,435
Accrued salaries, wages and benefits	17,739	21,296
Income tax payable	2,072	3,557
Current maturities of long-term debt	3,074	4,885
Current portion of operating lease liabilities	5,704	4,797
Other current liabilities	8,718	31,261
Total current liabilities	74,017	103,231
Deferred tax liabilities	7,456	11,178
Long-term debt, net of current portion	151,052	79,025
Operating lease liabilities, net of current portion	51,295	55,053
Other non-current liabilities	17,289	17,237
Total liabilities	301,109	265,724
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock - $0.01 par value per share, 90,000 shares authorized, 42,686 and 43,027 shares issued and outstanding at December 31, 2020 and 2021, respectively	430	427
Additional paid-in capital	474,757	493,332
Accumulated deficit	(219,100)	(205,875)
Accumulated other comprehensive loss	(31,902)	(33,732)
Total stockholders’ equity	224,185	254,152
Total liabilities, preferred stock, and stockholders’ equity	579,101	624,962
Series D Preferred Stock
Current liabilities:
Preferred stock	53,807	0
Preferred stock	53,807	0
Series B Preferred Stock
Current liabilities:
Preferred stock	0	105,086
Preferred stock	$ 0	$ 105,086