Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 15,186	$ 28,656
Accounts receivable, net of allowances of $1,762 and $1,352 at June 30, 2022 and December 31, 2021, respectively	82,621	71,419
Inventories	84,726	75,027
Income tax receivable	10,931	11,808
Other current assets	13,267	9,372
Total current assets	206,731	196,282
Property, plant and equipment, net of accumulated depreciation of $210,618 and $197,936 at June 30, 2022 and December 31, 2021, respectively	202,239	209,105
Operating lease right-of-use assets	46,042	46,443
Intangible assets, net	81,545	88,718
Investment in joint venture	30,875	34,045
Deferred tax assets	375	314
Other non-current assets	5,350	4,194
Total assets	573,157	579,101
Liabilities, Current [Abstract]
Accounts payable	47,859	36,710
Accrued salaries, wages and benefits	15,217	17,739
Income tax payable	687	2,072
Current maturities of long-term debt	3,139	3,074
Current portion of operating lease liabilities	5,103	5,704
Other current liabilities	12,439	8,718
Total current liabilities	84,444	74,017
Deferred tax liabilities	8,141	7,456
Long-term debt, net of current portion	151,317	151,052
Operating lease liabilities, net of current portion	50,899	51,295
Other non-current liabilities	13,031	17,289
Total liabilities	307,832	301,109
Commitments and contingencies (Note 9)
Common stock - $0.01 par value per share, 90,000 shares authorized, 43,884 and 43,027 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	439	430
Additional paid-in capital	473,019	474,757
Accumulated deficit	(230,969)	(219,100)
Accumulated other comprehensive loss	(36,167)	(31,902)
Total stockholders’ equity	206,322	224,185
Total liabilities, preferred stock, and stockholders’ equity	573,157	579,101
Series D Preferred Stock
Liabilities, Current [Abstract]
Series D perpetual preferred stock - $0.01 par value per share, 65 shares authorized, issued and outstanding at June 30, 2022 and December 31, 2021, respectively	$ 59,003	$ 53,807