Consolidated Balance Sheets $ in Millions	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Current assets:
Cash and cash equivalents	$ 1,994,000	$ 21,457,000
Certificates of deposit	0	2,880,000
Debt Securities, Held-to-maturity, Current	0	6,077,000
Accounts receivable, net	54,078,000	50,338,000
Income tax receivable	6,104,000	1,643,000
Note receivable	27,000	28,000
Inventories, net	77,612,000	70,786,000
Prepaid expenses and other	1,046,000	518,000
Total current assets	140,861,000	153,727,000
Property, plant and equipment:
Land	3,114,000	2,233,000
Buildings	97,393,000	92,075,000
Machinery and equipment	212,779,000	184,316,000
Furniture and fixtures	16,597,000	13,714,000
Total property, plant and equipment	329,883,000	292,338,000
Less: Accumulated depreciation	166,880,000	149,963,000
Property, plant and equipment, net	163,003,000	142,375,000
Intangible assets, net	506,000	0
Goodwill	3,229,000	0
Note receivable, long-term	598,000	678,000
Total assets	308,197,000	296,780,000
Current liabilities:
Revolving credit facility	0	0
Accounts payable	10,616,000	10,967,000
Accrued liabilities	37,455,000	39,098,000
Total current liabilities	48,071,000	50,065,000
Deferred revenue	1,655,000	1,512,000
Deferred tax liabilities	10,826,000	7,977,000
Donations	146,000	0
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, 51,991,242 and 52,422,801 issued and outstanding at December 31, 2018 and 2017, respectively	208,000	210,000
Additional paid-in capital	0	0
Retained earnings	247,291,000	237,016,000
Total stockholders’ equity	247,499,000	237,226,000
Total liabilities and stockholders’ equity	$ 308,197,000	$ 296,780,000