Description of Business (Credit Facility) (Details) (USD $)	0 Months Ended		1 Months Ended				3 Months Ended
	Sep. 18, 2013	Oct. 03, 2012	Aug. 31, 2012	Aug. 23, 2012	Dec. 31, 2013 Revolving Credit Facility	Nov. 11, 2010 Revolving Credit Facility	Dec. 31, 2013 Revolving Credit Facility Machinery and Equipment	Aug. 26, 2013 Revolving Credit Facility Fifth Amendment	Dec. 31, 2013 Revolving Credit Facility LIBOR Rate Loan letter_of_credit	Jun. 30, 2012 Revolving Credit Facility LIBOR Rate Loan
Line of Credit Facility [Line Items]
Maximum revolving credit amount						$ 35,000,000	$ 5,000,000.0	$ 7,500,000	$ 35,000,000
Line of credit facility, minimum cash balance and excess liquidity requirement					2,500,000
Increase in eligible borrowing base							4,200,000
Line of credit facility, monthly reduction amount							91,000
Borrowing base percent of accounts earned							60.00%
Line of credit facility, increase in minimum cash balance and excess liquidity requirement					750,000
Line of credit facility, increased minimum cash balance and excess liquidity requirement					5,000,000
Credit facility, amount outstanding									17,200,000
Credit facility, interest rate on outstanding balance									3.30%
Standby letters of credit, total amount outstanding									1,300,000
Number of standby letters of credit outstanding									5
Credit facility, remaining borrowing capacity										4,900,000
Credit facility, expected availability amount over next twelve month period, as percentage of maximum revolving credit amount									50.00%
Shelf registration, registered amount			50,000,000
Shelf registration, effective period				3 years
Common stock issued to underwriters (in shares)	2,875,000	1,832,410
Proceeds from issuance of common stock	$ 11,700,000	$ 9,500,000