Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 19,966	$ 3,309
Receivables (less allowance for doubtful accounts at September 30, 2020, and December 31, 2019 - $24)	52,673	40,931
Inventory	142,798	136,931
Prepaid expenses	3,928	2,048
Refundable income taxes	1,719	987
Total current assets	221,084	184,206
Property, plant, and equipment	323,755	313,958
Less accumulated depreciation and amortization	(194,112)	(185,539)
Property, plant, and equipment, net	129,643	128,419
Operating lease right-of-use assets, net	5,362	6,490
Other assets	5,657	3,482
Total assets	361,746	322,597
Current Liabilities
Current maturities of long-term debt	412	401
Accounts payable	29,055	29,511
Accrued expenses	14,938	9,383
Total current liabilities	44,405	39,295
Long-term debt, less current maturities	40,363	40,658
Credit agreement - revolver	13,733	1
Long-term operating lease liabilities	3,226	4,267
Deferred credits	1,035	1,233
Other noncurrent liabilities	4,818	4,170
Deferred income taxes	2,165	1,929
Total liabilities	109,745	91,553
Commitments and Contingencies (Note 7)
Capital stock
Preferred, 5% non-cumulative; $10 par value; authorized 1,000 shares; issued and outstanding 437 shares	4	4
Common stock
No par value; authorized 40,000,000 shares; issued 18,115,965 shares at September 30, 2020 and December 31, 2019; and 16,913,313 and 17,028,125 shares outstanding at September 30, 2020 and December 31, 2019, respectively	6,715	6,715
Additional paid-in capital	15,284	14,029
Retained earnings	253,354	230,784
Accumulated other comprehensive loss	(157)	(246)
Treasury stock, at cost, 1,202,652 and 1,087,840 at September 30, 2020 and December 31, 2019, respectively	(23,199)	(20,242)
Total stockholders’ equity	252,001	231,044
Total liabilities and stockholders’ equity	$ 361,746	$ 322,597