Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities
Net income	$ 10,442,000	$ 10,819,000	$ 18,463,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation & amortization	28,396,000	26,239,000	23,042,000
Amortization of debt issuance costs	756,000	691,000	487,000
Loss on disposals of property, plant and equipment	353,000	210,000	447,000
Impairment charges on property, plant and equipment	652,000	1,072,000	0
Deferred rent	2,386,000	3,884,000	2,382,000
Stock based compensation	2,669,000	3,156,000	4,333,000
Deferred income taxes	4,429,000	9,737,000	(395,000)
Changes in operating assets and liabilities:
Receivables	(703,000)	33,000	(448,000)
Inventories	(24,836,000)	(10,964,000)	(4,417,000)
Prepaid expenses and other assets	(2,410,000)	4,159,000	(5,849,000)
Accounts payable	(8,201,000)	12,048,000	4,195,000
Income tax receivable / payable	2,229,000	(4,159,000)	(1,917,000)
Accrued expenses and other liabilities	2,008,000	(11,234,000)	13,229,000
Net cash provided by operating activities	18,170,000	45,691,000	53,552,000
Cash Flows From Investing Activities
Purchases of property, plant and equipment	(35,287,000)	(40,556,000)	(27,256,000)
Proceeds from insurance	1,033,000
Proceeds from the sale of property, plant and equipment	111,000	7,000	4,000
Net cash used in investing activities	(34,143,000)	(40,549,000)	(27,252,000)
Cash Flows From Financing Activities
Payments of long-term debt and capital lease obligations	(103,267,000)	(36,575,000)	(37,822,000)
Advances on line of credit	129,095,000	35,000,000	10,000,000
Dividends paid	(10,404,000)	(10,366,000)
Contributions to NMTC fund			3,174,000
Proceeds from exercise of stock options		1,639,000	842,000
Employee taxes paid for shares withheld	(119,000)	(318,000)	(56,000)
Debt issuance costs	(374,000)
Security deposits			(4,000)
Net cash provided by (used in) financing activities	14,931,000	(10,620,000)	(23,866,000)
Effect of exchange rate changes on cash	(52,000)	6,000	(35,000)
Net change in cash	(1,094,000)	(5,472,000)	2,399,000
Cash, cash equivalents and restricted cash beginning of period	7,476,000	12,948,000	10,549,000
Cash, cash equivalents and restricted cash end of period	6,382,000	7,476,000	12,948,000
Cash, cash equivalents and restricted cash end of period	7,476,000	12,948,000	10,549,000
Supplemental disclosure of cash flow information
Purchases of property, plant and equipment included in accounts payable and accrued expenses	3,974,000	636,000	2,271,000
Cash paid for interest	2,625,000	1,822,000	1,811,000
Cash paid for income taxes, net of refunds	$ 1,507,000	$ 7,603,000	$ 15,162,000