UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (8,284)	$ (50,303)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	34,122	34,775
Stock-based compensation	2,031	2,473
Amortization of deferred financing costs	1,772	2,342
Interest income on interest rate swap	0	(1,809)
Deferred income taxes	1,198	25,443
Provision (benefit) for bad debts	216	(124)
Loss on sales of property and equipment	55	155
Changes in operating assets and liabilities:
Accounts receivable	906	(4,297)
Inventories	2,322	(2,281)
Prepaid expenses and other current assets	(7,799)	(6,784)
Accounts payable	(4,443)	(1,274)
Accrued expenses and other liabilities	3,103	2,344
Income taxes payable	(40)	2,846
Other assets and liabilities	801	(3,865)
Net cash provided by (used in) operating activities	25,960	(359)
Cash flows from investing activities:
Capital expenditures	(2,894)	(2,131)
Net cash used in investing activities	(2,894)	(2,131)
Cash flows from financing activities:
Repayment of long-term debt	(11,581)	(131,599)
Payment of preferred dividends	(9,970)	(2,200)
Payment for redemption of convertible preferred stock	(5,330)	0
Net proceeds from issuance of convertible preferred stock	0	145,490
Costs associated with issuance of convertible preferred stock	0	(7,006)
Proceeds from long-term debt	0	2,042
Payment of deferred financing costs	0	(7,988)
Proceeds from issuance of stock under employee stock purchase plan	163	259
Net cash used in financing activities	(26,718)	(1,002)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(3,056)	(1,176)
Net decrease in cash and cash equivalents	(6,708)	(4,668)
Cash and cash equivalents, beginning of period	50,030	29,817
Cash and cash equivalents, end of period	43,322	25,149
Cash paid for:
Cash paid for interest	14,822	18,381
Cash paid for income taxes	4,560	1,733
Supplemental schedule of non-cash investing and financing activities:
Accrued purchases of property and equipment	$ 116	$ 146