Long-Term Debt - Summary (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Debt Instrument [Line Items]
Long-term Debt	$ 3,036		$ 3,057
Less current portion	(191)		(202)
Long-term debt, Noncurrent	2,845		2,855
Industrial Development Revenue Bonds 0.47 Percent Interest Payable 31 March 2012
Debt Instrument [Line Items]
Long-term Debt	2,960	[1]	2,960	[1]
Secured Term Loan Payable To Government Agency Three Percent Interest Payable 31 December 2015
Debt Instrument [Line Items]
Long-term Debt	76		86
Secured Term Loan Payable To Government Agency Three Percent Waived Percent Interest Payable30 September 2012
Debt Instrument [Line Items]
Long-term Debt			$ 11

[1] The Industrial Development Revenue Bonds were issued by a government agency to finance the construction of the Company's headquarters/advanced technology facility. Annual sinking fund payments of $170,000 commenced December 1, 2000 and continue through 2013, with a final payment of $2,620,000 due December 1, 2014. The Company has agreed to reimburse the issuer of the letter of credit if there are draws on that letter of credit. The Company pays the letter of credit bank an annual fee of 1% of the amount secured thereby and pays the remarketing agent for the bonds an annual fee of 1/4% of the principal amount outstanding. The Company's interest under the facility capital lease has been pledged to secure its obligations to the government agency, the bank and the bondholders.