Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 19,415		$ 3,159
Certificates of deposit	3,460		3,120
Investments held to maturity at amortized cost	7,353		2,832
Accounts receivable, net	50,108		43,866
Income tax receivable	410		694
Notes receivable	29		28
Inventories, net	34,131		32,614
Prepaid expenses and other	900		740
Deferred tax assets	5,605		4,493
Total current assets	121,411		91,546
Property, plant and equipment:
Land	1,340		1,340
Buildings	60,126		59,761
Machinery and equipment	118,253		117,617
Furniture and fixtures	9,322		8,906
Total property, plant and equipment	189,041		187,624
Less: Accumulated depreciation	102,963		96,929
Property, plant and equipment, net	86,078		90,695
Certificates of deposit	1,298		2,120
Investments held to maturity at amortized cost	11,475		8,041
Note receivable	952		1,091
Total assets	221,214		193,493
Current liabilities:
Revolving credit facility	0		0
Accounts payable	13,858		13,047
Dividends payable	3,712		0
Accrued liabilities	36,045		26,578
Total current liabilities	53,615		39,625
Deferred revenue	201		0
Deferred tax liabilities	14,878		15,732
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.001 par value, 16,875,000 shares authorized, no shares issued	0	[1]	0	[1]
Common stock, $.004 par value, 168,750,000 shares authorized, 36,754,988 and 36,776,624 issued and outstanding at June 30, 2013 and December 31, 2012, respectively	147	[1]	147	[1]
Additional paid-in capital	0		0
Retained earnings	152,373		137,989
Total stockholders' equity	152,520		138,136
Total liabilities and stockholders' equity	$ 221,214		$ 193,493

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