Long-term Debt and Capital Lease Obligations, Line of Credit Facility (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 90,000,000	$ 90,000,000
Reserve Against line of Credit	15,000,000	15,000,000
Line of Credit Facility, Remaining Borrowing Capacity	75,000,000	75,000,000
Line of Credit Facility, Current Borrowing Capacity	$ 60,385,000	$ 60,385,000
Line of Credit Facility, Borrowing Capacity, Description	The maximum amount, less reserves, available for borrowing at levels below $30,000 are based on a sum of 45% of eligible receivables, 30% of eligible inventories and an additional amount of eligible equipment up to 20% of total borrowings under the facility. The maximum amount, less reserves, available for borrowing at levels above $30,000 are based on a sum of 75% of eligible receivables, 45% of eligible inventories and an additional amount of eligible equipment up to 20% of total borrowings under the facility.
Line of Credit Facility, Interest Rate During Period		4.10%
Commitment fee (in hundredths)		0.50%
Federal funds rate [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)		0.50%
One Month Eurodollar [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)		1.00%
Minimum [Member]
Line of Credit Facility [Line Items]
Commitment fee (in hundredths)		0.375%
Minimum [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)		3.00%
Minimum [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)		2.00%
Maximum [Member]
Line of Credit Facility [Line Items]
Commitment fee (in hundredths)		0.50%
Maximum [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)		3.50%
Maximum [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Spread over reference rate (in hundredths)		2.50%