Short-term and Long-term Debt - Components of Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Long-term debt consists of:
Less current portion	$ (236)	$ (234)
Long-term debt, less current portion	4,399	4,459
Long-term debt secured by leased building and land	4,635
Note payable to a bank
Long-term debt consists of:
Long-term debt	$ 4,635	$ 4,693