Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 2,289		$ 3,159
Certificates of deposit	8,186		3,120
Investments held to maturity at amortized cost	11,421		2,832
Accounts receivable, net	46,129		43,866
Income tax receivable	1,769		694
Notes receivable	29		28
Inventories, net	33,383		32,614
Prepaid expenses and other	619		740
Deferred tax assets	5,296		4,493
Total current assets	109,121		91,546
Property, plant and equipment:
Land	1,353		1,340
Buildings	60,435		59,761
Machinery and equipment	122,356		117,617
Furniture and fixtures	9,539		8,906
Total property, plant and equipment	193,683		187,624
Less: Accumulated depreciation	105,975		96,929
Property, plant and equipment, net	87,708		90,695
Certificates of deposit	4,483		2,120
Investments held to maturity at amortized cost	17,867		8,041
Note receivable	959		1,091
Total assets	220,138		193,493
Current liabilities:
Revolving credit facility	0		0
Accounts payable	12,795		13,047
Accrued liabilities	30,314		26,578
Total current liabilities	43,109		39,625
Deferred revenue	358		0
Deferred tax liabilities	14,741		15,732
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, 168,750,000 shares authorized, 36,709,890 and 36,776,624 issued and outstanding at September 30, 2013 and December 31, 2012, respectively	147	[1]	147	[1]
Additional paid-in capital	0		0
Retained earnings	161,783		137,989
Total stockholders' equity	161,930		138,136
Total liabilities and stockholders' equity	$ 220,138		$ 193,493

[1] Reflects three-for-two stock split effective July 2, 2013