Shareholders' Equity - Additional Information (Details) (USD $)	12 Months Ended				12 Months Ended							12 Months Ended									18 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2014 1989 Plan [Member]	Jun. 30, 2014 1997 Plan [Member]	Jun. 30, 2013 1997 Plan [Member]	Jun. 30, 2012 1997 Plan [Member]	Jun. 30, 2014 Employees [Member]	Jun. 30, 2013 Employees [Member]	Jun. 30, 2012 Employees [Member]	Jun. 30, 2014 Common Class A [Member]	Jun. 30, 2013 Common Class A [Member]	Jun. 30, 2012 Common Class A [Member]	Jun. 30, 2014 Common Class A [Member] 1989 Plan [Member]	Jun. 30, 2012 Common Class A [Member] Employees [Member]	Jun. 30, 2014 Common Class A [Member] Director [Member]	Jun. 30, 2013 Common Class A [Member] Director [Member]	Jun. 30, 2012 Common Class A [Member] Director [Member]	Jun. 30, 2014 Common Class C [Member]	Jun. 30, 2014 Share Repurchase Plan, December 2012 and Renewal, December 2013 [Member] Common Class A [Member]	Dec. 07, 2012 Share Repurchase Plan - December 2012 [Member]	Jun. 30, 2014 Share Repurchase Renewal, December 2013 [Member]	Dec. 31, 2014 Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Monthly dividend																								$ 0.005
Stock repurchase program, authorized amount																						$ 2,750,000
Remaining authorized repurchase amount																							2,570,000
Class A common stock purchased	93,351	55,052										93,351	55,052
Repurchasing amount	289,000	174,000	0									289,000	174,000								463,000
Number of shares repurchased																					148,403
Class A common stock granted (shares)																15,600	3,600	3,600	3,600
Class A common stock granted (in dollars per share)																$ 4.73	$ 3.07	$ 4.16	$ 6.65
Conversion of shares of class C common stock for class A common stock, Shares												1,340	2,516	60
Conversion ratio, shares converted (per share)												1
Conversion ratio, shares issued as a result of stock conversion (per share)																				1
Number of shares authorized under Stock Option Plan						400,000									1,600,000
Annual award vesting, percentage								20.00%							20.00%
Number of options outstanding	22,000	29,000	29,000	25,300	0
Options issued under Stock Option Plan expiration															10 years
Stock Options Granted	0	0	5,000			0	0	5,000
Options Granted Under 1997 Plan, Fair Value								$ 8,000
Award vesting period					6 months			5 years
Expected volatility factor based on historical volatility			49.90%
Risk-free interest rate			2.40%
Expected life			5 years 8 months 1 day
Options exercisable	22,000								22,000	25,000	22,000
Weighted average exercise price (in dollars per share)	$ 18.72								$ 18.72	$ 18.71	$ 19.21