Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Assets
Total available for sale securities	$ 10,147	$ 10,148
Fair Value, Recurring
Assets
Money market funds (cash and cash equivalents)	342	354
Total available for sale securities	10,147	10,148
Preferential conversion feature (long-term)	532	0
Other investments (long-term)	550	514
Total assets	11,571	11,016
Liabilities
Total liabilities	4,633	5,079
Fair Value, Recurring | U.S. Corporate
Assets
Total available for sale securities	0	0
Fair Value, Recurring | Government - U.S. treasury securities
Assets
Total available for sale securities	10,147	10,148
Fair Value, Recurring | Interest Rate Swap
Liabilities
Interest rate swap (short-term)	1,638	1,631
Interest rate swap (long-term)	2,995	3,448
Fair Value, Recurring | Level 1
Assets
Money market funds (cash and cash equivalents)	342	354
Total available for sale securities	0	0
Preferential conversion feature (long-term)	0	0
Other investments (long-term)	0	0
Total assets	342	354
Liabilities
Total liabilities	0	0
Fair Value, Recurring | Level 1 | U.S. Corporate
Assets
Total available for sale securities	0	0
Fair Value, Recurring | Level 1 | Government - U.S. treasury securities
Assets
Total available for sale securities	0	0
Fair Value, Recurring | Level 1 | Interest Rate Swap
Liabilities
Interest rate swap (short-term)	0	0
Interest rate swap (long-term)	0	0
Fair Value, Recurring | Level 2
Assets
Money market funds (cash and cash equivalents)	0	0
Total available for sale securities	10,147	10,148
Preferential conversion feature (long-term)	0	0
Other investments (long-term)	0	0
Total assets	10,147	10,148
Liabilities
Total liabilities	4,633	5,079
Fair Value, Recurring | Level 2 | U.S. Corporate
Assets
Total available for sale securities	0	0
Fair Value, Recurring | Level 2 | Government - U.S. treasury securities
Assets
Total available for sale securities	10,147	10,148
Fair Value, Recurring | Level 2 | Interest Rate Swap
Liabilities
Interest rate swap (short-term)	1,638	1,631
Interest rate swap (long-term)	2,995	3,448
Fair Value, Recurring | Level 3
Assets
Money market funds (cash and cash equivalents)	0	0
Total available for sale securities	0	0
Preferential conversion feature (long-term)	532	0
Other investments (long-term)	550	514
Total assets	1,082	514
Liabilities
Total liabilities	0	0
Fair Value, Recurring | Level 3 | U.S. Corporate
Assets
Total available for sale securities	0	0
Fair Value, Recurring | Level 3 | Government - U.S. treasury securities
Assets
Total available for sale securities	0	0
Fair Value, Recurring | Level 3 | Interest Rate Swap
Liabilities
Interest rate swap (short-term)	0	0
Interest rate swap (long-term)	$ 0	$ 0