Short-term and Long-term Debt - Components of Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Long-term debt consists of:
Long-term debt	$ 14,777	$ 4,693
Less current portion	(10,439)	(234)
Long-term debt, less current portion	4,338	4,459
Long-term debt secured by leased building and land	4,577
Note payable to a bank
Long-term debt consists of:
Long-term debt	4,577	4,693
Revolving line of credit
Long-term debt consists of:
Long-term debt	$ 10,200	$ 0