Short-term and Long-term Debt - Components of Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Long-term debt consists of:
Less current portion	$ (41)	$ (37)
Long-term debt, less current portion	212	253
Long-term debt secured by leased building and land	253
Note payable to a bank [Member]
Long-term debt consists of:
Long-term debt	$ 253	$ 290