Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 101,813	$ 79,025
Restricted Cash		660	3,263
Accounts receivable, net of allowance for credit losses of $477 and $506, respectively		58,756	47,387
Income tax receivable		1,999	4,587
Notes receivable		32	31
Inventories, net		104,553	82,219
Prepaid expenses and other		2,802	3,739
Total current assets		270,615	220,251
Property, plant and equipment:
Land		5,016	4,072
Buildings		131,327	122,171
Machinery and equipment		299,226	281,266
Furniture and fixtures		21,679	18,956
Total property, plant and equipment		457,248	426,465
Less: Accumulated depreciation		216,667	203,125
Property, plant and equipment, net		240,581	223,340
Goodwill and intangible assets, net		3,229	3,267
Right of use assets		1,421	1,571
Note receivable		557	579
Total assets		516,403	449,008
Current liabilities:
Accounts payable		25,940	12,447
Accrued liabilities		48,266	46,586
Total current liabilities		74,206	59,033
Deferred tax liabilities		31,090	28,324
Other long-term liabilities		4,434	4,423
New market tax credit obligation	[1]	6,394	6,363
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.001 par value, 5,000,000 shares authorized, no shares issued		0	0
Common stock, $.004 par value, 100,000,000 shares authorized, 52,420,486 and 52,224,767 issued and outstanding at September 30, 2021 and December 31, 2020, respectively		210	209
Additional paid-in capital		11,966	5,161
Retained earnings		388,103	345,495
Total stockholders' equity		400,279	350,865
Total liabilities and stockholders' equity		$ 516,403	$ 449,008

[1]  (a) Held by variable interest entities (Note 14)