Description of Business - Credit Facility (Details) (USD $)	0 Months Ended			1 Months Ended
	Sep. 18, 2013	Oct. 03, 2012	Aug. 23, 2012	Aug. 31, 2012	Sep. 30, 2014 Revolving Credit Facility LIBOR Rate Loan letter_of_credit	Nov. 11, 2010 Revolving Credit Facility LIBOR Rate Loan	Dec. 10, 2014 Subsequent Event Revolving Credit Facility LIBOR Rate Loan	Dec. 09, 2014 Subsequent Event Revolving Credit Facility LIBOR Rate Loan	Oct. 22, 2014 Digital Products Business Subsequent Event
Line of Credit Facility [Line Items]
Promissory note receivable for planned transaction									$ 16,000,000.0
Maximum revolving credit amount						15,000,000.00	15,000,000.0	35,000,000
Credit facility, amount outstanding					26,500,000
Credit facility, interest rate on outstanding balance					3.30%
Standby letters of credit, total amount outstanding					1,900,000
Number of standby letters of credit outstanding					6
Credit facility, remaining borrowing capacity					2,500,000
Credit facility, expected availability amount over next twelve month period, as percentage of maximum revolving credit amount (at least 50%)					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