Description of Business (Credit Facility) (Details) (USD $)	0 Months Ended	3 Months Ended	9 Months Ended		1 Months Ended					6 Months Ended		19 Months Ended
	Oct. 03, 2012	Jun. 30, 2012	Jun. 30, 2013	Nov. 11, 2010	Dec. 31, 2011 Revolving Credit Facility	Jun. 30, 2013 Revolving Credit Facility letter_of_credit	Jun. 30, 2012 Revolving Credit Facility	May 21, 2013 Fourth Amendment	May 01, 2013 Subsequent Event Revolving Credit Facility	Dec. 31, 2012 January 1, 2013	Dec. 31, 2012 January 1, 2013 Revolving Credit Facility	Jun. 14, 2012 July 1, 2012	Jun. 14, 2012 July 1, 2012 Revolving Credit Facility	Dec. 28, 2012 Before March 31, 2013	Dec. 28, 2012 After March 31, 2013	Jun. 30, 2013 December 31, 2012	May 21, 2013 July 1, 2013 Fourth Amendment	May 21, 2013 December 31, 2013 Fourth Amendment	May 21, 2013 June 30, 2013 Fourth Amendment	May 21, 2013 March 31, 2014 Fourth Amendment	May 21, 2013 June 30, 2014 Fourth Amendment
Line of Credit Facility [Line Items]
Maximum revolving credit amount				$ 35,000,000		$ 35,000,000		$ 5,000,000.0						$ 7,600,000	$ 5,000,000		$ 3,000,000.0	$ 0
Excess availability financial covenant requirement, revised amount					3,500,000
First Amendment to Credit Facility:
Increase in eligible borrowing base		10,000,000			10,000,000
Eligible percentage of appraised value of equipment, original percentage amount					85.00%
Eligible percentage of appraised value of real estate, original percentage amount					50.00%
Excess availability financial covenant requirement, original amount					7,500,000
Additional rate added to LIBOR rate for outstanding borrowings					4.00%
Credit facility amendment condition, upon receipt of flood-related insurance proceeds in excess of this amount			30,000,000		30,000,000
Second Amendment to Credit Facility:
Line of credit facility, automatic borrowing base reduction, first amendment										3,100,000	3,100,000	8,100,000	8,100,000
Line of credit facility, automatic borrowing base reduction, second amendment										0	0	5,000,000	5,000,000
Third Amendment to Credit Facility:
Line of credit facility, monthly reduction amount														101,000	91,000
Line of credit facility, increase in minimum cash balance and excess liquidity requirement																7,500,000
Line of credit facility, minimum cash balance and excess liquidity requirement			3,500,000
Fourth Amendment to Credit Facility:
Minimum cash balance and excess liquidity requirement								3,500,000.0											4,500,000.0	5,500,000.0	7,500,000.0
Borrowing base percent of accounts earned								60.00%
Credit Facility Disclosures:
Credit facility, amount outstanding						20,100,000
Credit facility, interest rate on outstanding balance						3.40%
Credit facility, current amount outstanding									13,000,000
Standby letters of credit, total amount outstanding						1,200,000
Number of standby letters of credit outstanding						4
Credit facility, remaining borrowing capacity							2,100,000
Credit facility, expected availability amount over next twelve month period, as percentage of maximum revolving credit amount						70.00%
Common stock issued to underwriters (in shares)	1,832,410
Proceeds from issuance of common stock	$ 9,500,000