Long-Term Debt - Summary of long term debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 2,656		$ 2,662
Less current portion	(2,640)		(2,641)
Long-term debt, Noncurrent	16		21
Industrial Development Revenue Bonds
Debt Instrument [Line Items]
Long-term debt	2,620	[1]	2,620	[1]
Secured term loan payable to government agency
Debt Instrument [Line Items]
Long-term debt	$ 36		$ 42

[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 .25% 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. The Company is currently evaluating refinancing options in anticipation of the December 1, 2014 maturity.