Short-term and Long-term Obligations - Bank of America (Details) - Bank of America	1 Months Ended	9 Months Ended
	Jun. 30, 2015 USD ($)	Mar. 31, 2016 USD ($) building
Minimum
Short-term Debt [Line Items]
Interest rate (as a percent)	0.79%	1.00%
Maximum
Short-term Debt [Line Items]
Interest rate (as a percent)	1.68%	1.94%
Line of Credit | Revolving Credit Facility
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 65,000,000
Line of credit, total outstanding balance	$ 59,699,000	$ 62,199,000
Credit facility, remaining borrowing capacity		$ 2,801,000
Line of Credit | Revolving Credit Facility | LIBOR
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)		1.25%
LIBOR rate (as a percent)		0.44%
Term Loan
Short-term Debt [Line Items]
Credit facility, term	5 years
Term loan, face amount	$ 14,000,000
Number of buildings as collateral | building		3
Debt, total outstanding borrowings	$ 3,733,000	$ 1,633,000
Term Loan | LIBOR
Short-term Debt [Line Items]
Credit facility, basis spread on variable rate (as a percent)	1.50%